Improper Input Validation

Affecting mediawiki package, versions <1:1.27.7-1~deb9u7

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NVD Description

Note: Versions mentioned in the description apply to the upstream mediawiki package. See Remediation section below for Debian:9 relevant versions.

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).

Remediation

Upgrade Debian:9 mediawiki to version 1:1.27.7-1~deb9u7 or higher.

References

CVSS Score

5.3
medium severity
  • Attack Vector
    Network
  • Attack Complexity
    Low
  • Privileges Required
    None
  • User Interaction
    None
  • Scope
    Unchanged
  • Confidentiality
    None
  • Integrity
    Low
  • Availability
    None
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N
CVE
CVE-2020-35477
CWE
CWE-20
Snyk ID
SNYK-DEBIAN9-MEDIAWIKI-1052803
Disclosed
18 Dec, 2020
Published
18 Dec, 2020