CVE-2020-35477: debian debian_linux
Vulnerability summary
CVE-2020-35477 is a medium (CVSS 5.3) vulnerability in debian debian_linux. EPSS estimates a 1.71% chance of exploitation in the next 30 days, higher than 77.1% of scored vulnerabilities. 1 public exploit is recorded.
Advisory lineage
Upstream 0 · Downstream 3Timeline
- 18-12-2020PublishedVulnerability first disclosed.
- 04-08-2024Last modifiedVulnerability information updated.
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).
CVSS metrics
4 scores · 3 sources · 2 versions- OSV · UbuntuEcosystem advisory · calculated5.3MediumCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N
- OSV · DebianEcosystem advisory · calculated5.3MediumCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N
EPSS trend
Probability
1.71%
Chance of exploitation in the next 30 days
Percentile
77%
Versus all other CVEs
30-day change
0.00 pp
From 1.71% on 21-09-2026
Known exploited
Compare KEV catalogsNot in any of the 3 tracked catalogs.
Public exploits
1 foundExploit Reference (phabricator.wikimedia.org)
Maturity: unknown
Weaknesses
CWE · root causeAffected systems
Debian2 products
- mediawiki< 1:1.35.1-1
- debian_linuxEOL9.0 | 10.0
Fedoraproject1 product
- fedoraEOL33
Mediawiki1 product
- mediawiki< 1.35.1
Ubuntu1 product
- mediawikiAll versions (No fix recorded)
4 vendors · 5 products
References
9 links- lists.wikimedia.org/pipermail/mediawiki-announce/2020-December/000268.htmlX Refsource MISCREPORTMailing ListRelease NotesVendor Advisory
- lists.debian.org/debian-lts-announce/2020/12/msg00034.htmlMailing ListX Refsource MLISTThird Party Advisory