CVE-2020-26227 json
Cross-Site Scripting in Fluid view helpers
published 2020-11-23 5 y ago modified 2026-09-10 1 mo ago also BIT-typo3-2020-26227 , EUVD-2020-1506 , GHSA-vqqx-jw6p-q3rf
- cvss
- 6.1
- version 3.1, CNA
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 0.7%
- EPSS 0.7% chance of exploitation in 30 days, percentile 54%
- public exploits
- 0
- none known
Summary
TYPO3 is an open source PHP based web content management system. In TYPO3 before versions 9.5.23 and 10.4.10 the system extension Fluid (typo3/cms-fluid) of the TYPO3 core is vulnerable to cross-site scripting passing user-controlled data as argument to Fluid view helpers. Update to TYPO3 versions 9.5.23 or 10.4.10 that fix the problem described.
Patch / fix
- packagist typo3/cms-core 8.7.38, 9.5.23, 10.4.10
- packagist typo3/cms 8.7.38, 9.5.23, 10.4.10
- bitnami typo3 6.2.54, 7.6.48, 8.7.38, 9.5.23, 10.4.10
- typo3 typo3 6.2.54, 7.6.48, 8.7.38, 9.5.23, 10.4.10
Exploit prediction
0.72% chance of exploitation in the next 30 days, higher than 54% of all scored CVEs (FIRST EPSS, 2026-11-08).
Exploits and checks
- github.com https://github.com/TYPO3/TYPO3.CMS/security/advisories/GHSA-vqqx-jw6p-q3rf referenced PoC, tagged "exploit" by a source, unverified
- typo3.org https://typo3.org/security/advisory/typo3-core-sa-2020-010 referenced PoC, tagged "exploit" by a source, unverified
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CNA | 3.1 | 6.1 | CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N |
| GitHub | 3.1 | 6.1 | CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N |
| NVD | 3.1 | 6.1 | CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N |
| NVD | 2.0 | 4.3 | AV:N/AC:M/Au:N/C:N/I:P/A:N |
| OSV | 3.1 | 6.1 | CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N |
Affected packages
| ecosystem | package | affected | fixed in |
|---|---|---|---|
| packagist | typo3/cms-core | >=9.0.0, <9.5.23 >=10.0.0, <10.4.10 >=8.7.0, <8.7.38 |
9.5.23 10.4.10 8.7.38 |
| packagist | typo3/cms | >=10.0.0, <10.4.10 >=9.0.0, <9.5.23 >=8.7.0, <8.7.38 |
10.4.10 9.5.23 8.7.38 |
| bitnami | typo3 | >=6.2.0, <6.2.54 >=7.6.0, <7.6.48 >=8.7.0, <8.7.38 >=9.0.0, <9.5.23 >=10.0.0, <10.4.10 |
6.2.54 7.6.48 8.7.38 9.5.23 10.4.10 |
Affected products
- TYPO3 TYPO3.CMS
Classification
- Weakness
-
- CWE-79 Improper Neutralization of Input During Web Page Generation
References
-
github.com
/TYPO3/TYPO3.CMS/security/advisories/GHSA-vqqx-jw6p-q3rf
web, exploit, third-party-advisory
-
typo3.org
/security/advisory/typo3-core-sa-2020-010
web, exploit, vendor-advisory
-
nvd.nist.gov
/vuln/detail/CVE-2020-26227
advisory
-
github.com
/FriendsOfPHP/security-advisories/blob/master/typo3/cms-core/CVE-2020-26227.yaml
web
-
github.com
/FriendsOfPHP/security-advisories/blob/master/typo3/cms/CVE-2020-26227.yaml
web
-
packagist.org
/packages/typo3/cms-core
web
Sources
- CVE List CVE-2020-26227
- GitHub Advisory GHSA-vqqx-jw6p-q3rf
- NVD CVE-2020-26227
- OSV BIT-typo3-2020-26227
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