CVE-2015-8623: mediawiki Cross-Site Request Forgery (CSRF)
Vulnerability summary
CVE-2015-8623 is a high (CVSS 8.8) Cross-Site Request Forgery (CSRF) vulnerability in mediawiki. EPSS estimates a 0.73% chance of exploitation in the next 30 days, higher than 53.7% of scored vulnerabilities.
Advisory lineage
Upstream 0 · Downstream 1Timeline
- 23-03-2017PublishedVulnerability first disclosed.
- 06-08-2024Last modifiedVulnerability information updated.
Description
The User::matchEditToken function in includes/User.php in MediaWiki before 1.23.12 and 1.24.x before 1.24.5 does not perform token comparison in constant time before returning, which allows remote attackers to guess the edit token and bypass CSRF protection via a timing attack, a different vulnerability than CVE-2015-8624.
CVSS metrics
4 scores · 3 sources · 2 versions- OSV · UbuntuEcosystem advisory · calculated8.8HighCVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
- OSV · DebianEcosystem advisory · calculated8.8HighCVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
EPSS trend
Probability
0.73%
Chance of exploitation in the next 30 days
Percentile
54%
Versus all other CVEs
30-day change
-0.03 pp
From 0.76% on 21-09-2026
Known exploited
Compare KEV catalogsNot in any of the 3 tracked catalogs.
Public exploits
0 foundNo public exploits indexed.
Weaknesses
CWE · root causeAffected systems
Debian1 product
- mediawiki< 1:1.25.5-1
Mediawiki1 product
- mediawiki≤ 1.23.11 | 1.24.0 | 1.24.1 | 1.24.2 | 1.24.3 | 1.24.4
Ubuntu1 product
- mediawiki< 1:1.27.4-3
3 vendors · 3 products
References
8 links- lists.wikimedia.org/pipermail/mediawiki-announce/2015-December/000186.htmlMailing ListX Refsource MLISTPatchRelease NotesVendor Advisory
- www.openwall.com/lists/oss-security/2015/12/23/7Mailing ListX Refsource MLISTPatchThird Party Advisory
- www.openwall.com/lists/oss-security/2015/12/21/8Mailing ListX Refsource MLISTPatchThird Party Advisory
