XSS Vulnerability in Apache Syncope Enduser Login (3.0-3.0.15, 4.0-4.0.3)
CVE-2026-23794 Published on February 3, 2026
Apache Syncope: Reflected XSS on Enduser Login
Reflected XSS in Apache Syncope's Enduser Login page.
An attacker that tricks a legitimate user into clicking a malicious link and logging in to Syncope Enduser could steal that user's credentials.
This issue affects Apache Syncope: from 3.0 through 3.0.15, from 4.0 through 4.0.3.
Users are recommended to upgrade to version 3.0.16 / 4.0.4, which fix this issue.
Vulnerability Analysis
CVE-2026-23794 is exploitable with network access, requires user interaction and a small amount of user privileges. This vulnerability is considered to have a low attack complexity. The potential impact of an exploit of this vulnerability is considered to have a high impact on confidentiality, with no impact on integrity and availability.
Weakness Type
What is a XSS Vulnerability?
The software does not neutralize or incorrectly neutralizes user-controllable input before it is placed in output that is used as a web page that is served to other users.
CVE-2026-23794 has been classified to as a XSS vulnerability or weakness.
Products Associated with CVE-2026-23794
You can be notified by email with stack.watch whenever vulnerabilities like CVE-2026-23794 are published in Apache Syncope:
Affected Versions
Apache Software Foundation Apache Syncope:- Version 3.0, <= 3.0.15 is affected.
- Version 4.0, <= 4.0.3 is affected.
Exploit Probability
EPSS (Exploit Prediction Scoring System) scores estimate the probability that a vulnerability will be exploited in the wild within the next 30 days. The percentile shows you how this score compares to all other vulnerabilities.