# CVE-2024-55921: Cross-Site Request Forgery in Extension Manager Module in TYPO3 > Attackers can exploit CSRF in the Extension Manager to install malicious extensions, potentially leading to remote code execution if specific security settings are disabled. - **Severity:** High 7.5 (`CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H`) - **Exploited in the wild:** Not known - **Login needed:** Not needed - **Attackable:** Over the internet - **Victim action needed:** A user has to click or open something - **Fix available:** Yes - **Published:** 14 Jan 2025 - **Updated:** 15 Jan 2025 - **Also known as:** GHSA-4g52-pq8j-6qv5 ## What is CVE-2024-55921? CVE-2024-55921 is a high-severity vulnerability in Typo3 Typo3, published on 14 Jan 2025. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link. ### Official description 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. Weakness: CWE-749 (Exposed Dangerous Method or Function), CWE-352 (Cross-Site Request Forgery) ## Which versions are affected by CVE-2024-55921? 8 open source packages ship an affected version, including typo3/cms-extensionmanager. It affects 1 product. | Package | Ecosystem | Affected | Fixed in | | --- | --- | --- | --- | | `typo3/cms-extensionmanager` | Packagist | From 10.0.0 | 10.4.48 | | `typo3/cms-extensionmanager` | Packagist | From 10.0.0 | 10.4.48 | | `typo3/cms-extensionmanager` | Packagist | From 11.0.0 | 11.5.42 | | `typo3/cms-extensionmanager` | Packagist | From 11.0.0 | 11.5.42 | | `typo3/cms-extensionmanager` | Packagist | From 12.0.0 | 12.4.25 | | `typo3/cms-extensionmanager` | Packagist | From 12.0.0 | 12.4.25 | | `typo3/cms-extensionmanager` | Packagist | From 13.0.0 | 13.4.3 | | `typo3/cms-extensionmanager` | Packagist | From 13.0.0 | 13.4.3 | Products: Typo3 Typo3. ## How do I fix CVE-2024-55921? Upgrade typo3/cms-extensionmanager to a fixed version for your release line: 10.4.48, 11.5.42, 12.4.25 or 13.4.3. ## Is CVE-2024-55921 being exploited? There is no known exploitation of CVE-2024-55921 in the wild and no public exploit code. ## Other vulnerabilities in Typo3 Typo3 - [CVE-2009-0258](https://insights.sbomify.com/CVE-2009-0258/): Indexed Search Engine for TYPO3 Command Execution via Metacharacter Injection (critical 10.0) - [CVE-2011-3583](https://insights.sbomify.com/CVE-2011-3583/): Typo3 SQL injection due to faulty prepared statements (critical 9.8) - [CVE-2011-4628](https://insights.sbomify.com/CVE-2011-4628/): Typo3 Authentication Bypass (critical 9.8) - [CVE-2023-24814](https://insights.sbomify.com/CVE-2023-24814/): Persisted Cross-Site Scripting in Frontend Rendering in typo3 (high 8.8) - [CVE-2021-41113](https://insights.sbomify.com/CVE-2021-41113/): Cross-Site-Request-Forgery in Backend URI Handling in Typo3 (high 8.8) ## Fix prompt for AI coding agents ```text Check this codebase for CVE-2024-55921 and fix it if it is affected. What it is: CVE-2024-55921 is a high-severity vulnerability in Typo3 Typo3, published on 14 Jan 2025. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link. Exploitation: There is no known exploitation of CVE-2024-55921 in the wild and no public exploit code. Affected packages and fixed versions: - typo3/cms-extensionmanager (Packagist): affected from 10.0.0; fixed in 10.4.48 - typo3/cms-extensionmanager (Packagist): affected from 10.0.0; fixed in 10.4.48 - typo3/cms-extensionmanager (Packagist): affected from 11.0.0; fixed in 11.5.42 - typo3/cms-extensionmanager (Packagist): affected from 11.0.0; fixed in 11.5.42 - typo3/cms-extensionmanager (Packagist): affected from 12.0.0; fixed in 12.4.25 - typo3/cms-extensionmanager (Packagist): affected from 12.0.0; fixed in 12.4.25 - typo3/cms-extensionmanager (Packagist): affected from 13.0.0; fixed in 13.4.3 - typo3/cms-extensionmanager (Packagist): affected from 13.0.0; fixed in 13.4.3 Task: 1. Search the dependency manifests and lockfiles (for example package.json, package-lock.json, requirements.txt, poetry.lock, uv.lock, pom.xml, build.gradle, go.mod, Cargo.lock, Gemfile.lock) and any Dockerfiles for the affected packages, including transitive dependencies. 2. If an affected version is in use, upgrade it to the fixed version for its release line with the project's package manager, so the lockfile is regenerated. Prefer the smallest upgrade that fixes it. 3. If there is no fix, or the upgrade would break the build, do not guess: explain the risk and the safest workaround instead. 4. Run the tests and summarise what changed and why. 5. If nothing in the project is affected, say so and change nothing. Reference: https://insights.sbomify.com/CVE-2024-55921/ (Markdown: https://insights.sbomify.com/CVE-2024-55921/index.md) ``` ## Sources - CVE record: https://www.cve.org/CVERecord?id=CVE-2024-55921 - NVD: https://nvd.nist.gov/vuln/detail/CVE-2024-55921 - OSV: https://osv.dev/vulnerability/CVE-2024-55921 --- From sbomify Insights: https://insights.sbomify.com/CVE-2024-55921/ Summaries are generated and may contain mistakes; the official description above is the record.