Apache Answer

ApacheAnswer: Missing Auth in Reaction API Before 2.0.3
CVE-2026-90910 9.8 - Critical - October 19, 2026

Missing authentication for critical function vulnerability in Apache Answer. This issue affects Apache Answer: through 2.0.2. The reaction API did not enforce content visibility controls, allowing unauthorized users to read reaction metadata from restricted content or add and remove their own reactions. Users are recommended to upgrade to version 2.0.3, which fixes the issue.

Missing Authentication for Critical Function

Apache Answer 2.0.2 Auth Algorithm Flaw Bypasses Account Suspension
CVE-2026-86589 5.4 - Medium - October 19, 2026

Incorrect implementation of authentication algorithm vulnerability in Apache Answer. This issue affects Apache Answer: through 2.0.2. A flaw in the User Center login integration can cause a newly created external user session to omit its external identity, allowing subsequent requests to bypass central account suspension or deletion checks until the session expires or is revoked. Users are recommended to upgrade to version 2.0.3, which fixes the issue.

Incorrect Implementation of Authentication Algorithm

Apache Answer <2.0.3 Unauth Access to Non-Public Content
CVE-2026-79633 - October 19, 2026

vulnerability in Apache Answer. This issue affects Apache Answer: through 2.0.2. Missing authorization checks allowed authenticated users to perform actions on non-public content they were not permitted to access. Users are recommended to upgrade to version 2.0.3, which fixes the issue.

Exposure of Sensitive Information Through Data Queries

Apache Answer <2.0.3: Insufficient Session Expiration (CVE-2026-79624)
CVE-2026-79624 - October 19, 2026

Insufficient session expiration vulnerability in Apache Answer. This issue affects Apache Answer: through 2.0.2. Insufficient session invalidation allowed revoked users to continue accessing known private uploaded files with a stale visit token. Users are recommended to upgrade to version 2.0.3, which fixes the issue.

Insufficient Session Expiration

Apache Answer <=2.0.2: Auth Bypass Reveals Metadata in Similar-Question Search
CVE-2026-79620 - October 19, 2026

Exposure of sensitive information through data queries vulnerability in Apache Answer. This issue affects Apache Answer: through 2.0.2. An improper authorization check in the similar-question search allowed authenticated users to view metadata of non-public questions. Users are recommended to upgrade to version 2.0.3, which fixes the issue.

Exposure of Sensitive Information Through Data Queries

Apache Answer 2.0.2 Unauthenticated Comment Disclosure via Public User Profiles
CVE-2026-79613 - October 19, 2026

vulnerability in Apache Answer. This issue affects Apache Answer: through 2.0.2. Unauthenticated attackers could access comments associated with non-public content through public user profiles. Users are recommended to upgrade to version 2.0.3, which fixes the issue.

Exposure of Sensitive Information Through Data Queries

Apache Answer 2.0.2 Sensitive Info Exposure via Hidden Question Metadata
CVE-2026-76994 - October 19, 2026

Exposure of Sensitive Information to an Unauthorized Actor vulnerability in Apache Answer. This issue affects Apache Answer: through 2.0.2. Unauthenticated attackers could obtain metadata associated with hidden questions through public answer profiles. Users are recommended to upgrade to version 2.0.3, which fixes the issue.

Information Disclosure

Apache Answer <=2.0.2 Missing Auth Allows API Key Access to Hidden Answers
CVE-2026-71563 4.3 - Medium - October 19, 2026

Missing Authorization vulnerability in Apache Answer. This issue affects Apache Answer: through 2.0.2. An authorization flaw in the MCP answer retrieval tool allows holders of a global API key to access answer content associated with hidden, deleted, or pending-review questions. Users are recommended to upgrade to version 2.0.3, which fixes the issue.

AuthZ

Apache Answer 2.0.2 Missing Auth for Invited-User List
CVE-2026-68482 5.3 - Medium - October 19, 2026

Missing Authorization vulnerability in Apache Answer. This issue affects Apache Answer: through 2.0.2. An unauthenticated or unauthorized user can retrieve the invited-user list associated with a non-public question due to missing visibility authorization checks. Users are recommended to upgrade to version 2.0.3, which fixes the issue.

AuthZ

Apache Answer 2.0.2 Verification Code Reuse Vulnerability
CVE-2026-67249 5.4 - Medium - October 19, 2026

A vulnerability in Apache Answer. This issue affects Apache Answer: through 2.0.2. A verification code issued for one email-based workflow could be accepted by another sensitive workflow because the code purpose was not properly enforced. Users are recommended to upgrade to version 2.0.3, which fixes the issue.

AuthZ

Apache Answer 2.0.2 permission check bug in Question Controller
CVE-2026-64945 - October 19, 2026

A vulnerability in Apache Answer. This issue affects Apache Answer: through 2.0.2. The question operation controller gates hide/show operations on the wrong permission check result (the unpin permission instead of the hide permission), so in custom role configurations that separate these permissions, a user granted only question.unpin can hide or restore questions without holding question.hide or question.show. Users are recommended to upgrade to version 2.0.3, which fixes the issue.

AuthZ

Apache Answer 2.0.2 Stored XSS via Importer
CVE-2026-64944 - October 19, 2026

Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') vulnerability in Apache Answer. This issue affects Apache Answer: through 2.0.2. The importer stores imported question bodies as raw HTML without passing them through the normal Markdown-to-HTML sanitization path, so attacker-controlled HTML embedded in an imported data source is persisted and rendered to all viewers (including privileged users) as stored XSS. Users are recommended to upgrade to version 2.0.3, which fixes the issue.

XSS

Apache Answer 2.0.2 Log Injection of API Keys
CVE-2026-64943 8.1 - High - October 19, 2026

Insertion of Sensitive Information into Log File vulnerability in Apache Answer. This issue affects Apache Answer: through 2.0.2. Full API keys are written to application logs on every authenticated request, allowing anyone with log-read access to recover and replay active bearer credentials. Users are recommended to upgrade to version 2.0.3, which fixes the issue.

Insertion of Sensitive Information into Log File

Apache Answer 2.x Admin API Keys Fail Session Expiration
CVE-2026-60053 9.1 - Critical - August 05, 2026

Insufficient Session Expiration vulnerability in Apache Answer. This issue affects Apache Answer: through 2.0.1. Administrative API keys remained usable after the owning administrator was demoted or the account was marked inactive, suspended, or deleted, allowing continued access until the keys were explicitly removed. Users are recommended to upgrade to version 2.0.2, which fixes the issue.

Insufficient Session Expiration

Apache Answer 2.0.1 Unauthorized Data Exposure via Read Path
CVE-2026-60023 7.5 - High - August 05, 2026

Exposure of Sensitive Information to an Unauthorized Actor vulnerability in Apache Answer. This issue affects Apache Answer: through 2.0.1. Deleted or pending answers could be retrieved by unauthorized users through the single-answer read path when the parent question remained visible, exposing answer content that should not have been accessible. Users are recommended to upgrade to version 2.0.2, which fixes the issue.

Information Disclosure

Apache Answer(<=2.0.1) AuthZ Bypass: Edit-Reject Without Review Perm
CVE-2026-50749 6.5 - Medium - August 05, 2026

Improper Authorization vulnerability in Apache Answer. This issue affects Apache Answer: through 2.0.1. Any authenticated user can reject arbitrary pending edit-revisions without review permission due to a missing authorization check on the reject operation. Users are recommended to upgrade to version 2.0.2, which fixes the issue.

AuthZ

Apache Answer 2.0.1 - Authenticated Delete Vulnerability in Avatar-Cleanup
CVE-2026-48912 6.5 - Medium - August 05, 2026

Improper Input Validation vulnerability in Apache Answer. This issue affects Apache Answer: through 2.0.1. A missing ownership check in the avatar-cleanup logic allows any authenticated user to delete other users' uploaded files by supplying their file URLs. Users are recommended to upgrade to version 2.0.2, which fixes the issue.

Insecure Direct Object Reference / IDOR

Apache Answer 2.0.1 External-Login Vulnerability Allows Account Takeover
CVE-2026-48911 7.5 - High - August 05, 2026

Insufficient Verification of Data Authenticity vulnerability in Apache Answer. This issue affects Apache Answer: through 2.0.1. A missing authorization check in the external-login email binding flow allows unauthenticated attackers to take over arbitrary user accounts by tricking victims into clicking a crafted confirmation link. Users are recommended to upgrade to version 2.0.2, which fixes the issue.

Missing Authentication for Critical Function

Apache Answer 2.0.1 Improper Length Param Handling - DoS
CVE-2026-48834 7.5 - High - August 05, 2026

Improper Handling of Length Parameter Inconsistency vulnerability in Apache Answer. This issue affects Apache Answer: through 2.0.1. Unauthenticated attackers can cause a denial of service via a specially crafted Accept-Language header that triggers excessive CPU consumption during parsing. Users are recommended to upgrade to version 2.0.2, which fixes the issue.

Resource Exhaustion

Apache Answer <=2.0.0 Improper Auth Token Assignment Vulnerability
CVE-2026-25700 7.2 - High - June 10, 2026

Improper Restriction of Security Token Assignment vulnerability in Apache Answer. This issue affects Apache Answer: through 2.0.0. Previously issued administrative tokens were not invalidated after an administrator account was suspended, deleted, or deactivated, allowing continued access to administrative APIs until the token expired. Users are recommended to upgrade to version 2.0.1, which fixes the issue.

Improper Restriction of Security Token Assignment

Apache Answer 2.0.0 Unrestricted Unlisted Questions API Disclosure
CVE-2026-34905 6.5 - Medium - June 09, 2026

Exposure of Sensitive Information to an Unauthorized Actor vulnerability in Apache Answer. This issue affects Apache Answer: through 2.0.0. The unlisted question feature did not enforce access restrictions on direct API endpoints, allowing authenticated users to discover and access unlisted questions, their answers, comments, and revision history. Users are recommended to upgrade to version 2.0.1, which fixes the issue.

Information Disclosure

Apache Answer 2.0.0 XSS via Unescaped HTML in Email Notifications
CVE-2026-34033 5.4 - Medium - June 09, 2026

Improper Neutralization of Script-Related HTML Tags in a Web Page (Basic XSS) vulnerability in Apache Answer. This issue affects Apache Answer: through 2.0.0. User-supplied content was included in notification emails without proper escaping, allowing authenticated users to inject arbitrary HTML into emails sent to other users. Users are recommended to upgrade to version 2.0.1, which fixes the issue.

Basic XSS

Apache Answer 2.0.0 Unrestricted Upld of External Image URL
CVE-2026-34031 6.5 - Medium - June 09, 2026

Unrestricted Upload of File with Dangerous Type vulnerability in Apache Answer. This issue affects Apache Answer: through 2.0.0. The server did not sufficiently validate user-supplied image URLs, allowing arbitrary external content to be embedded as profile images, which could expose users to unintended external requests and tracking by third-party servers. Users are recommended to upgrade to version 2.0.1, which fixes the issue.

Unrestricted File Upload

Apache Answer 2.0.0 Unrestricted Upload CVE-2026-33582
CVE-2026-33582 6.5 - Medium - June 09, 2026

Unrestricted Upload of File with Dangerous Type vulnerability in Apache Answer. This issue affects Apache Answer: through 2.0.0. A crafted TIFF image could trigger excessive memory allocation during image decoding, allowing an authenticated user to cause the server process to crash. Users are recommended to upgrade to version 2.0.1, which fixes the issue.

Unrestricted File Upload

Apache Answer <2.0.0 Privileged Data Leak via Timeline API
CVE-2026-25699 6.1 - Medium - June 09, 2026

Exposure of Private Personal Information to an Unauthorized Actor vulnerability in Apache Answer. This issue affects Apache Answer: through 2.0.0. Timeline-related APIs lacked proper authorization checks, allowing regular authenticated users to access deleted, private, or unapproved content and its revision history. Users are recommended to upgrade to version 2.0.1, which fixes the issue.

Privacy violation

Apache Answer XSS: Invalid Neutralization of Alternate Syntax, Fixed in 2.0.1
CVE-2026-25688 6.1 - Medium - June 09, 2026

Improper Neutralization of Alternate XSS Syntax vulnerability in Apache Answer. This issue affects Apache Answer: through 2.0.0. AI-generated response content was rendered in the browser without proper sanitization, allowing malicious scripts to be executed when the content was viewed. Users are recommended to upgrade to version 2.0.1, which fixes the issue.

Improper Neutralization of Alternate XSS Syntax

Exposing Deleted Revision History in Apache Answer 1.7.1 (fixed in 2.0.0)
CVE-2026-24735 7.5 - High - February 04, 2026

Exposure of Private Personal Information to an Unauthorized Actor vulnerability in Apache Answer. This issue affects Apache Answer: through 1.7.1. An unauthenticated API endpoint incorrectly exposes full revision history for deleted content. This allows unauthorized user to retrieve restricted or sensitive information. Users are recommended to upgrade to version 2.0.0, which fixes the issue.

Privacy violation

Private IP Disclosure via Public Method in Apache Answer <=1.4.2
CVE-2025-29868 - April 01, 2025

Private Data Structure Returned From A Public Method vulnerability in Apache Answer. This issue affects Apache Answer: through 1.4.2. If a user uses an externally referenced image, when a user accesses this image, the provider of the image may obtain private information about the ip address of that accessing user. Users are recommended to upgrade to version 1.4.5, which fixes the issue. In the new version, administrators can set whether external content can be displayed.

Private Data Structure Returned From A Public Method

Apache Answer Inadequate Encryption Strength via UUID v1 (v1.4.0)
CVE-2024-45719 - November 22, 2024

Inadequate Encryption Strength vulnerability in Apache Answer. This issue affects Apache Answer: through 1.4.0. The ids generated using the UUID v1 version are to some extent not secure enough. It can cause the generated token to be predictable. Users are recommended to upgrade to version 1.4.1, which fixes the issue.

Apache Answer <1.4.0 MD5 Gravatar Leakage Inadequate Encryption Strength
CVE-2024-40761 - September 25, 2024

Inadequate Encryption Strength vulnerability in Apache Answer. This issue affects Apache Answer: through 1.3.5. Using the MD5 value of a user's email to access Gravatar is insecure and can lead to the leakage of user email. The official recommendation is to use SHA256 instead. Users are recommended to upgrade to version 1.4.0, which fixes the issue.

Apache Answer <1.3.5: Reused Password Reset Links After Use (CVE-2024-41888)
CVE-2024-41888 5.3 - Medium - August 12, 2024

Missing Release of Resource after Effective Lifetime vulnerability in Apache Answer. This issue affects Apache Answer: through 1.3.5. The password reset link remains valid within its expiration period even after it has been used. This could potentially lead to the link being misused or hijacked. Users are recommended to upgrade to version 1.3.6, which fixes the issue.

Missing Release of Resource after Effective Lifetime

Apache Answer 1.3.5: Missing Resource Release in Password Reset Emails
CVE-2024-41890 5.3 - Medium - August 12, 2024

Missing Release of Resource after Effective Lifetime vulnerability in Apache Answer. This issue affects Apache Answer: through 1.3.5. User sends multiple password reset emails, each containing a valid link. Within the link's validity period, this could potentially lead to the link being misused or hijacked. Users are recommended to upgrade to version 1.3.6, which fixes the issue.

Missing Release of Resource after Effective Lifetime

Apache Answer XSS via Personal Website Input before 1.3.0
CVE-2024-29217 - April 21, 2024

Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') vulnerability in Apache Answer.This issue affects Apache Answer: before 1.3.0. XSS attack when user changes personal website. A logged-in user, when modifying their personal website, can input malicious code in the website to create such an attack. Users are recommended to upgrade to version [1.3.0], which fixes the issue.

XSS

Apache Answer 1.2.1 Unrestricted Dangerous File Upload Pixel Flood OOM
CVE-2024-22393 - February 22, 2024

Unrestricted Upload of File with Dangerous Type vulnerability in Apache Answer.This issue affects Apache Answer: through 1.2.1. Pixel Flood Attack by uploading large pixel files will cause server out of memory. A logged-in user can cause such an attack by uploading an image when posting content. Users are recommended to upgrade to version [1.2.5], which fixes the issue.

Unrestricted File Upload

Apache Answer 1.2.x XSS via Summary Input (Pre-1.2.5)
CVE-2024-23349 5.4 - Medium - February 22, 2024

Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') vulnerability in Apache Answer.This issue affects Apache Answer: through 1.2.1. XSS attack when user enters summary. A logged-in user, when modifying their own submitted question, can input malicious code in the summary to create such an attack. Users are recommended to upgrade to version [1.2.5], which fixes the issue.

Apache Answer Race Condition Allows Duplicate User Registration before 1.2.5
CVE-2024-26578 5.9 - Medium - February 22, 2024

Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition') vulnerability in Apache Answer.This issue affects Apache Answer: through 1.2.1. Repeated submission during registration resulted in the registration of the same user. When users register, if they rapidly submit multiple registrations using scripts, it can result in the creation of multiple user accounts simultaneously with the same name. Users are recommended to upgrade to version [1.2.5], which fixes the issue.

Race Condition

Apache Answer 1.2.x Race Condition on Bookmarking
CVE-2023-49619 3.1 - Low - January 10, 2024

Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition') vulnerability in Apache Answer. This issue affects Apache Answer: through 1.2.0. Under normal circumstances, a user can only bookmark a question once, and will only increase the number of questions bookmarked once. However, repeat submissions through the script can increase the number of collection of the question many times. Users are recommended to upgrade to version [1.2.1], which fixes the issue.

Race Condition