Information disclosure in MediaWiki Checkuser
CVE-2019-18611
An issue was discovered in the CheckUser extension through 1.34 for MediaWiki. Certain sensitive information within oversighted edit summaries made available via the MediaWiki API was potentially visible to users with various levels of access to this extension. Said users should not have been able to view these oversighted edit summaries via the MediaWiki API.
Vulnerability class: Information Disclosure
Published · last modified .
CVSS v3 metric
CVSS v3 base score 6.5 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N.
EPSS exploit prediction
EPSS: 0.009 (60.4th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 60th percentile — 60.4% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.009 · newest: 0.009 · change: 0.000
Affected products
Weakness classification (CWE)
References
- phabricator.wikimedia.org/T234862 (Patch, Vendor Advisory)
- gerrit.wikimedia.org/r/q/Ie0aa0df2b3f03d8b910733f1b5e600a0dc978765 (Patch, Vendor Advisory)
Frequently asked questions
- What is CVE-2019-18611?
- CVE-2019-18611 is a medium-severity vulnerability in MediaWiki Checkuser, classified under Information Disclosure. CVSS score: 6.5/10. Published 2019-10-29.
- How severe is CVE-2019-18611?
- Medium severity. CVSS v3 base score is 6.5 out of 10.