Vulnerability in MediaWiki
CVE-2020-35480
An issue was discovered in MediaWiki before 1.35.1. Missing users (accounts that don't exist) and hidden users (accounts that have been explicitly hidden due to being abusive, or similar) that the viewer cannot see are handled differently, exposing sensitive information about the hidden status to unprivileged viewers. This exists on various code paths.
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:L/I:N/A:N.
EPSS exploit prediction
EPSS: 0.015 (73.2th percentile), scored .
Low probability of exploitation in the next 30 days, but still tracked. 73rd percentile — 73.2% 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: 0.015 · change: -0.000
Affected products
- MediaWiki
- Debian Linux — versions 9.0, 10.0
- Fedoraproject Fedora — versions 33
Weakness classification (CWE)
References
- phabricator.wikimedia.org/T120883 (Permissions Required)
- 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, Mailing List, 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-2020-35480?
- CVE-2020-35480 is a medium-severity vulnerability in MediaWiki, classified under Observable Discrepancy. CVSS score: 5.3/10. Published 2020-12-18.
- How severe is CVE-2020-35480?
- Medium severity. CVSS v3 base score is 5.3 out of 10.