TYPO3 CSRF via Deep Links in Backend UI (Fixed in 13.4.3 LTS)
CVE-2024-55921 Published on January 14, 2025
Cross-Site Request Forgery in Extension Manager Module in TYPO3
TYPO3 is a free and open source Content Management Framework. A vulnerability has been identified in the backend user interface functionality involving deep links. Specifically, this functionality is susceptible to Cross-Site Request Forgery (CSRF). Additionally, state-changing actions in downstream components incorrectly accepted submissions via HTTP GET and did not enforce the appropriate HTTP method. Successful exploitation of this vulnerability requires the victim to have an active session on the backend user interface and to be deceived into interacting with a malicious URL targeting the backend, which can occur under the following conditions: The user opens a malicious link, such as one sent via email. The user visits a compromised or manipulated website while the following settings are misconfigured: 1. `security.backend.enforceReferrer` feature is disabled, 2. `BE/cookieSameSite` configuration is set to lax or none. The vulnerability in the affected downstream component Extension Manager Module allows attackers to retrieve and install 3rd party extensions from the TYPO3 Extension Repository - which can lead to remote code execution in the worst case. Users are advised to update to TYPO3 versions 11.5.42 ELTS, 12.4.25 LTS, 13.4.3 LTS which fix the problem described.
Vulnerability Analysis
CVE-2024-55921 can be exploited with network access, requires user interaction. This vulnerability is consided to have a high level of attack complexity. The potential impact of an exploit of this vulnerability is considered to be very high.
Weakness Types
What is a Session Riding Vulnerability?
The web application does not, or can not, sufficiently verify whether a well-formed, valid, consistent request was intentionally provided by the user who submitted the request. When a web server is designed to receive a request from a client without any mechanism for verifying that it was intentionally sent, then it might be possible for an attacker to trick a client into making an unintentional request to the web server which will be treated as an authentic request. This can be done via a URL, image load, XMLHttpRequest, etc. and can result in exposure of data or unintended code execution.
CVE-2024-55921 has been classified to as a Session Riding vulnerability or weakness.
Exposed Dangerous Method or Function
The software provides an Applications Programming Interface (API) or similar interface for interaction with external actors, but the interface includes a dangerous method or function that is not properly restricted.
Products Associated with CVE-2024-55921
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Affected Versions
typo3:- Version >= 10.0.0, < 10.4.48 is affected.
- Version >= 11.0.0, < 11.5.42 is affected.
- Version >= 12.0.0, < 12.4.25 is affected.
- Version >= 13.0.0, < 13.4.3 is affected.
Vulnerable Packages
The following package name and versions may be associated with CVE-2024-55921
| Package Manager | Vulnerable Package | Versions | Fixed In |
|---|---|---|---|
| composer | typo3/cms-extensionmanager | >= 10.0.0, <= 10.4.47 | 10.4.48 |
| composer | typo3/cms-extensionmanager | >= 11.0.0, <= 11.5.41 | 11.5.42 |
| composer | typo3/cms-extensionmanager | >= 12.0.0, <= 12.4.24 | 12.4.25 |
| composer | typo3/cms-extensionmanager | >= 13.0.0, <= 13.4.2 | 13.4.3 |
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.