MediumGHSA-4j77-gg36-9864BIT-typo3-2020-11065CVE-2020-11065
Cross-Site Scripting in TYPO3 CMS Link Handling
Published 13 May 2020 · Updated 8 Jul 2026
Affected packages
typo3/cms-coreComposer
- Affected
- >=10.0.0 <10.4.2
- Fixed in
- 10.4.2
Update to the fixed version for your release line, for example:
composer require typo3/cms-core:^10.4.2typo3/cms-coreComposer
- Affected
- >=9.0.0 <9.5.17
- Fixed in
- 9.5.17
Update to the fixed version for your release line, for example:
composer require typo3/cms-core:^9.5.17typo3/cmsComposer
- Affected
- >=10.0.0 <10.4.2
- Fixed in
- 10.4.2
Update to the fixed version for your release line, for example:
composer require typo3/cms:^10.4.2typo3/cmsComposer
- Affected
- >=9.0.0 <9.5.17
- Fixed in
- 9.5.17
Update to the fixed version for your release line, for example:
composer require typo3/cms:^9.5.17Details
It has been discovered that link tags generated by typolink functionality are vulnerable to cross-site scripting - properties being assigned as HTML attributes have not been parsed correctly.
Update to TYPO3 versions 9.5.17 or 10.4.2 that fix the problem described.
References
- https://typo3.org/security/advisory/typo3-core-sa-2020-003
Is GHSA-4j77-gg36-9864 in any of your client repos?
Checking one package by hand is fine. Checking it across forty client projects is not. NPMscan reads the lockfiles in every GitHub repo you pick, finds each project with an affected typo3/cms-core, and gives you the command that fixes it.
References
- Linkgithub.com/TYPO3/TYPO3.CMS/security/advisories/GHSA-4j77-gg36-9864
- Advisorynvd.nist.gov/vuln/detail/CVE-2020-11065
- Linkgithub.com/FriendsOfPHP/security-advisories/blob/master/typo3/cms-core/CVE-2020-11065.yaml
- Linkgithub.com/FriendsOfPHP/security-advisories/blob/master/typo3/cms/CVE-2020-11065.yaml
- Linktypo3.org/security/advisory/typo3-core-sa-2020-003
Advisory data from OSV.dev (opens OSV.dev in a new tab), refreshed daily.