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MEDIUM severity

TYPO3 CMS vulnerable to Cross-Site Scripting in <f:asset.css> view helperGHSA-fv2m-9249-qx85

MEDIUMFix: TYPO3/typo3@6863f73

GHSA-fv2m-9249-qx85 is a medium-severity (CVSS 5.4) Cross-site Scripting (XSS) vulnerability in typo3/cms-core. A fix is available for typo3/cms-core — see the affected versions and patch details below.

Also known asBIT-typo3-2022-36108CVE-2022-36108
Published
Updated
Affected
4 pkgs
Patched
4 / 4
Exploits
None indexed
Exploitation data as of Nov 6, 2026 · OSV.dev, NVD, FIRST.org (EPSS)

EPSS Exploitation Probability

via FIRST.org ↗
0.9%probability of exploitation in next 30 days
Lower Risk0.00%
Lower risk than most CVEs61th percentile — riskier than 61% of all scored CVEsHighest risk
0.19%0.60%1.02%1.43%0.7%0.9%May 26Sep 26Nov 26

Probability of exploitation in the next 30 days, from FIRST.org EPSS.

How urgent is this, really

Where this sits among everything scored

Real-World Exposure

4 pkgs affected
🐘typo3/cms-core🐘typo3/cms-core🐘typo3/cms🐘typo3/cms

Real-time download stats are indexed for npm and PyPI packages. This vulnerability affects Packagist packages — download data is not available via public APIs for these ecosystems.

Description

Meta

  • CVSS: CVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:C/C:L/I:L/A:N/E:F/RL:O/RC:C (4.1)

Problem

It has been discovered that the f:asset.css view helper is vulnerable to cross-site scripting when user input is passed as variables to the CSS.

Solution

Update to TYPO3 version 10.4.32 or 11.5.16 that fix the problem described above.

Credits

Thanks to TYPO3 contributor member Frank Nägler who reported this issue and to TYPO3 core & security team member Oliver Hader who fixed the issue.

References

Affected Packages

4 total 4 fixed
EcosystemPackageVulnerable rangeFix
🐘Packagisttypo3/cms-core≥ 10.3.0&&< 10.4.3210.4.32composer require typo3/cms-core:^10.4.32
🐘Packagisttypo3/cms-core≥ 11.0.0&&< 11.5.1611.5.16composer require typo3/cms-core:^11.5.16
🐘Packagisttypo3/cms≥ 10.3.0&&< 10.4.3210.4.32composer require typo3/cms:^10.4.32
🐘Packagisttypo3/cms≥ 11.0.0&&< 11.5.1611.5.16composer require typo3/cms:^11.5.16

Affected Products

1 product · 2 configurations
Application
typo3typo3
≥ 11.0.0 && ≤ 11.5.15
range

Detection & mitigation playbook

Open-source dependency

  1. Detect

    Scan your dependency tree (package-lock.json, pnpm-lock.yaml, requirements.txt, go.sum, etc.) for typo3/cms-core, including transitive dependencies — a direct dependency you never call can still pull in a vulnerable version.

  2. Fix

    Update typo3/cms-core to 10.4.32 or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms GHSA-fv2m-9249-qx85 is resolved across your whole dependency graph.

  3. Workarounds

    Escape or sanitise the affected output on the server side rather than relying on client-side filtering, and add a Content-Security-Policy that blocks inline script execution so injected markup cannot run even if it reaches the page.

Frequently Asked Questions

> ### Meta > * CVSS: `CVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:C/C:L/I:L/A:N/E:F/RL:O/RC:C` (4.1) ### Problem It has been discovered that the `f:asset.css` view helper is vulnerable to cross-site scripting when user input is passed as variables to the CSS. ### Solution Update to TYPO3 version 10.4.32 or 11.5.16 that fix the problem described above. ### Credits Thanks to TYPO3 contributor member Frank Nägler who reported this issue and to TYPO3 core & security team member Oliver Hader who fixed the issue. ### References * [TYPO3-CORE-SA-2022-010](https://typo3.org/security/advisory/typo3-core-sa-202
O3 Security · Impact-Aware SCA

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