CVE-2020-26229 json
XML External Entity in Dashboard Widget
published 2020-11-23 5 y ago modified 2026-07-08 4 mo ago also BIT-typo3-2020-26229 , EUVD-2020-1468 , GHSA-q9cp-mc96-m4w2
- cvss
- 3.7
- version 3.1, CNA
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 0.6%
- EPSS 0.6% chance of exploitation in 30 days, percentile 51%
- public exploits
- 0
- none known
Summary
TYPO3 is an open source PHP based web content management system. In TYPO3 from version 10.4.0, and before version 10.4.10, RSS widgets are susceptible to XML external entity processing. This vulnerability is reasonable, but is theoretical - it was not possible to actually reproduce the vulnerability with current PHP versions of supported and maintained system distributions. At least with libxml2 version 2.9, the processing of XML external entities is disabled per default - and cannot be exploited. Besides that, a valid backend user account is needed. Update to TYPO3 version 10.4.10 to fix the problem described.
Patch / fix
- packagist typo3/cms-core 10.4.10
- packagist typo3/cms 10.4.10
- bitnami typo3 10.4.10
- typo3 typo3 10.4.10
Exploit prediction
0.64% chance of exploitation in the next 30 days, higher than 51% of all scored CVEs (FIRST EPSS, 2026-11-08).
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CNA | 3.1 | 3.7 | CVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:U/C:L/I:N/A:L |
| GitHub | 3.1 | 3.7 | CVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:U/C:L/I:N/A:L |
| NVD | 3.1 | 3.7 | CVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:U/C:L/I:N/A:L |
| NVD | 2.0 | 3.6 | AV:N/AC:H/Au:S/C:P/I:N/A:P |
| OSV | 3.1 | 3.7 | CVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:U/C:L/I:N/A:L |
Affected packages
| ecosystem | package | affected | fixed in |
|---|---|---|---|
| packagist | typo3/cms-core | >=10.0.0, <10.4.10 |
10.4.10 |
| packagist | typo3/cms | >=10.0.0, <10.4.10 |
10.4.10 |
| bitnami | typo3 | >=10.0.0, <10.4.10 |
10.4.10 |
Affected products
- TYPO3 TYPO3.CMS
Classification
- Weakness
-
- CWE-611 Improper Restriction of XML External Entity Reference
References
-
typo3.org
/security/advisory/typo3-core-sa-2020-012
web, vendor-advisory
-
github.com
/TYPO3/TYPO3.CMS/security/advisories/GHSA-q9cp-mc96-m4w2
web, third-party-advisory
-
nvd.nist.gov
/vuln/detail/CVE-2020-26229
advisory
-
github.com
/FriendsOfPHP/security-advisories/blob/master/typo3/cms-core/CVE-2020-26229.yaml
web
-
github.com
/FriendsOfPHP/security-advisories/blob/master/typo3/cms/CVE-2020-26229.yaml
web
Sources
- CVE List CVE-2020-26229
- GitHub Advisory GHSA-q9cp-mc96-m4w2
- NVD CVE-2020-26229
- OSV BIT-typo3-2020-26229
Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.