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CVE-2020-35475

HIGH
7.5
CVSS Score
Published: December 18, 2020 at 07:32 AM UTC
Updated: June 17, 2026 at 03:13 AM UTC
3 products affected across 3 vendorsDebian LinuxFedoraMediaWiki

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Severity
HIGH7.5
Exploit prediction
EPSS 2%

Description

In MediaWiki before 1.35.1, the messages userrights-expiry-current and userrights-expiry-none can contain raw HTML. XSS can happen when a user visits Special:UserRights but does not have rights to change all userrights, and the table on the left side has unchangeable groups in it. (The right column with the changeable groups is not affected and is escaped correctly.)

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

Debian Linux· Debiandrupal
95%
10.0
Fedora· Fedora Projectrpm
95%
33
MediaWiki· Mediawiki
95%
v < 1.35.1
Affected range stops below 1.35.1, so it looks safe — our inference, not a vendor statement

References (4)

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.html
x_refsource_MISCIssue TrackingThird Party Advisory
Source: [email protected]
https://phabricator.wikimedia.org/T268917
Vendor Advisoryx_refsource_DEBIANThird Party Advisory
Source: [email protected]
https://www.debian.org/security/2020/dsa-4816

CVSS

7.5HIGH[email protected]
Attack Vector
NETWORK
Complexity
LOW
Privileges
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
HIGH
Integrity
NONE
Availability
NONE
Vector?

Quick Info

StatusMODIFIED
CWE
CWE-79

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