HOMEVULNERABILITIESCVE-2020-26229
LOW

CVE-2020-26229

CWE-611Published: November 23, 2020· Updated: Jun 17, 2026

3.7
CVSS v3.1

Official Description

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.

NVD Source

Technical Analysis

CVE-2020-26229 can be exploited remotely over the network without requiring physical or adjacent access, significantly expanding the attack surface for threat actors.

Exploitation requires low privileges, which limits the exposure to scenarios where an attacker has already gained initial access.

CVSS v3.1 Vector Breakdown

Exploitability
Attack VectorNetwork
Attack ComplexityHigh
Privileges Req.Low
User InteractionRequired
ScopeUnchanged
Impact
ConfidentialityLow
IntegrityNone
AvailabilityLow
CVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:U/C:L/I:N/A:L

Affected Vendors & Products

typo31 product(s)
typo3
Source: NVD CPE · 1 total CPE entries

Exploit & PoC Resources

NO KNOWN EXPLOITNo public exploit confirmed at this time
Exploit-DB
Offensive Security exploit database
GitHub PoC Search
Community PoC repositories
Rapid7 / Metasploit
Metasploit module search
PacketStorm
Security advisories & exploits
NVD Detail
Official NIST entry
MITRE CVE
CVE Program entry
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Official Patches & Advisories

ADVISORYhttps://github.com/TYPO3/TYPO3.CMS/security/advisories/GHSA-q9cp-mc96-m4w2
ADVISORYhttps://typo3.org/security/advisory/typo3-core-sa-2020-012
ADVISORYhttps://github.com/TYPO3/TYPO3.CMS/security/advisories/GHSA-q9cp-mc96-m4w2
ADVISORYhttps://typo3.org/security/advisory/typo3-core-sa-2020-012

All References (4)

→
https://github.com/TYPO3/TYPO3.CMS/security/advisories/GHSA-q9cp-mc96-m4w2Third Party Advisory
→
https://typo3.org/security/advisory/typo3-core-sa-2020-012Vendor Advisory
→
https://github.com/TYPO3/TYPO3.CMS/security/advisories/GHSA-q9cp-mc96-m4w2Third Party Advisory
→
https://typo3.org/security/advisory/typo3-core-sa-2020-012Vendor Advisory

Quick Facts

CVE IDCVE-2020-26229
CVSS Score3.7 / 10
SeverityLOW
WeaknessCWE-611
CISA KEVNo
Affected1 vendor(s)
PublishedNov 23, 2020

Related CVEs (CWE-611)

CVE-2018-1000644
10.0
CVE-2018-1000652
10.0
CVE-2017-7664
10.0
CVE-2018-1000124
10.0
CVE-2018-1000651
10.0
CVE-2018-1000820
10.0

Recommended Actions

  • →Apply vendor patches immediately
  • →Monitor CVE-2020-26229 in threat intel feeds
  • →Review IDS/IPS signatures for exploitation attempts
Data sourced from NVD (NIST), CISA KEV, and EPSS (FIRST). Analysis generated by CTIWATCH.COM. CVE data is provided under the NVD usage policy.
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