CVE-2021-35197
mediawiki - security update
7.5
HIGH
CVSS 3.1
EPSS 0.73%
Description
In MediaWiki before 1.31.15, 1.32.x through 1.35.x before 1.35.3, and 1.36.x before 1.36.1, bots have certain unintended API access. When a bot account has a "sitewide block" applied, it is able to still "purge" pages through the MediaWiki Action API (which a "sitewide block" should have prevented).
How to fix CVE-2021-35197
To remediate CVE-2021-35197, upgrade the affected package to a fixed version below.
- —upgrade to 1.31.15 or later
- —upgrade to 1:1.35.4-1~deb11u1 or later
- —upgrade to 1:1.27.7-1~deb9u10 or later
- —upgrade to 1:1.31.16-1~deb10u1 or later
Is CVE-2021-35197 being exploited?
Low — EPSS is 0.7%, meaning exploitation activity has not been observed at scale.
Affected packages (4)
- from 0, < 1.31.15, >= 1.32.0, < 1.35.3, >= 1.36.0, < 1.36.1
- from 0, < 1:1.35.4-1~deb11u1
- from 0, < 1:1.27.7-1~deb9u10
- from 0, < 1:1.31.16-1~deb10u1
CVSS scores
| Source | Version | Severity | Vector |
|---|---|---|---|
| osv | CVSS 3.1 | HIGH7.5 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N |