CVE-2020-35477

MEDIUM
5.3
CVSS Score
Published: December 18, 2020 at 07:37 AM UTC
Updated: June 17, 2026 at 03:13 AM UTC
3 products affected across 3 vendorsDebian LinuxFedoraMediaWiki

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Severity
MEDIUM5.3
Exploit prediction
EPSS 2%

Description

MediaWiki before 1.35.1 blocks legitimate attempts to hide log entries in some situations. If one sets MediaWiki:Mainpage to Special:MyLanguage/Main Page, visits a log entry on Special:Log, and toggles the "Change visibility of selected log entries" checkbox (or a tags checkbox) next to it, there is a redirection to the main page's action=historysubmit (instead of the desired behavior in which a revision-deletion form appears).

Affected

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

v < 1.35.1
Affected range stops below 1.35.1, so it looks safe — our inference, not a vendor statement

CVSS

Attack Vector
NETWORK
Complexity
LOW
Privileges
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
NONE
Integrity
LOW
Availability
NONE
Vector?

Quick Info

StatusMODIFIED
CWE
CWE-670

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