CVE-2020-35474
MEDIUM
6.1
CVSS Score
Published: December 18, 2020 at 07:30 AM UTC
Updated: June 17, 2026 at 03:13 AM UTC
2 products affected across 2 vendorsFedoraMediaWiki
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Severity
MEDIUM6.1
Exploit prediction
EPSS 1%
Description
In MediaWiki before 1.35.1, the combination of Html::rawElement and Message::text leads to XSS because the definition of MediaWiki:recentchanges-legend-watchlistexpiry can be changed onwiki so that the output is raw HTML.
Affected
Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.
95%
v < 1.35.1
Affected range stops below 1.35.1, so it looks safe — our inference, not a vendor statement
Remediation
No guide yetNo remediation guidance has been written for this CVE yet. What the record does show:
References (3)
Vendor Advisoryx_refsource_FEDORA
Source: [email protected]
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/STT5Z4A3BCXVH3WIPICWU2FP4IPIMUPC/x_refsource_MISCMailing ListRelease NotesVendor Advisory
Source: [email protected]
https://lists.wikimedia.org/pipermail/mediawiki-announce/2020-December/000268.htmlx_refsource_MISCExploitThird Party Advisory
Source: [email protected]
https://phabricator.wikimedia.org/T268894CVSS
- Attack Vector
- NETWORK
- Complexity
- LOW
- Privileges
- NONE
- User Interaction
- REQUIRED
- Scope
- CHANGED
- Confidentiality
- LOW
- Integrity
- LOW
- Availability
- NONE
Vector?
Quick Info
StatusMODIFIED
CWE
CWE-79
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