Vulnerability in MediaWiki
CVE-2020-35477
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).
Published · last modified .
CVSS v3 metric
CVSS v3 base score 5.3 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N.
EPSS exploit prediction
EPSS: 0.017 (76.5th percentile), scored .
Low probability of exploitation in the next 30 days, but still tracked. 76th percentile — 76.5% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.015 · newest: 0.017 · change: +0.002
Affected products
- MediaWiki
- Debian Linux — versions 9.0, 10.0
- Fedoraproject Fedora — versions 33
Weakness classification (CWE)
References
- phabricator.wikimedia.org/T205908 (Exploit, Third Party Advisory, Issue Tracking)
- lists.wikimedia.org/pipermail/mediawiki-announce/2020-December/000268.html (Mailing List, Release Notes, Vendor Advisory)
- www.debian.org/security/2020/dsa-4816 (vendor-advisory, Third Party Advisory)
- lists.debian.org/debian-lts-announce/2020/12/msg00034.html (mailing-list, Mailing List, Third Party Advisory)
- lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/… (vendor-advisory)
Frequently asked questions
- What is CVE-2020-35477?
- CVE-2020-35477 is a medium-severity vulnerability in MediaWiki, classified under Always-Incorrect Control Flow Implementation. CVSS score: 5.3/10. Published 2020-12-18.
- How severe is CVE-2020-35477?
- Medium severity. CVSS v3 base score is 5.3 out of 10.