Summary
TYPO3 possible cache poisoning on the homepage when anchors are used
A request URL with arbitrary arguments, but still pointing to the home page of a TYPO3 installation can be cached if the configuration option config.prefixLocalAnchors is used with the values "all" or "cached". The impact of this vulnerability is that unfamiliar looking links to the home page can end up in the cache, which leads to a reload of the page in the browser when section links are followed by web page visitors, instead of just directly jumping to the requested section of the page. TYPO3 versions 4.6.x and higher are only affected if the homepage is not a shortcut to a different page.
Impact
Affected versions
Security releases
Kodem intelligence
Severity tells you how bad this could be in the worst case. It does not tell you whether you are exposed. Exploitability and impact are functions of runtime truth: whether the vulnerable code is present, reachable, and actually executes in your application. A vulnerable package can sit in your dependency tree and never run.
Kodem, an Intelligent Application Security platform, uses runtime intelligence to reveal which vulnerabilities actually execute in production, so teams prioritize the ones that genuinely matter. Kodem's runtime-powered SCA identifies whether this CVE is reachable in your applications.
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typo3/cms to 6.2.9 or later; typo3/cms to 7.0.2 or later
Kodem Kai can prioritize this vulnerability in your dependency tree and generate a fix recommendation.
Frequently Asked Questions
- What is GHSA-P84G-J2GH-83G3? GHSA-P84G-J2GH-83G3 is a high-severity security vulnerability in typo3/cms (composer), affecting versions >= 6.2.0, < 6.2.9. It is fixed in 6.2.9, 7.0.2.
- Which versions of typo3/cms are affected by GHSA-P84G-J2GH-83G3? typo3/cms (composer) versions >= 6.2.0, < 6.2.9 is affected.
- Is there a fix for GHSA-P84G-J2GH-83G3? Yes. GHSA-P84G-J2GH-83G3 is fixed in 6.2.9, 7.0.2. Upgrade to this version or later.
- Is GHSA-P84G-J2GH-83G3 exploitable, and should I be worried? Whether GHSA-P84G-J2GH-83G3 is exploitable in your environment depends on whether the vulnerable code is present and reachable. A CVSS score is a worst-case rating; it does not account for your specific deployment, configuration, or usage patterns. Kodem, an Intelligent Application Security platform, uses runtime intelligence to show which vulnerabilities actually execute in production, so you can focus on the ones that represent real risk. Get a demo
- What actually determines whether GHSA-P84G-J2GH-83G3 is exploitable, and how bad it is? Exploitability and impact are not fixed properties of a CVE. They depend on runtime truth: whether the vulnerable code is present, reachable, and actually executes in your application. A high CVSS score on a dependency that never runs is not the same as real risk. Kodem, an Intelligent Application Security platform, uses runtime intelligence to reveal which vulnerabilities actually execute in production, so teams prioritize the ones that genuinely matter.
- How do I fix GHSA-P84G-J2GH-83G3?
- Upgrade
typo3/cmsto 6.2.9 or later - Upgrade
typo3/cmsto 7.0.2 or later
- Upgrade