CVE-2020-35475
mediawiki - security update
7.5
HIGH
CVSS 3.1
EPSS 0.59%
Description
In MediaWiki before 1.35.1, the messages userrights-expiry-current and userrights-expiry-none can contain raw HTML. XSS can happen when a user visits Special:UserRights but does not have rights to change all userrights, and the table on the left side has unchangeable groups in it. (The right column with the changeable groups is not affected and is escaped correctly.)
How to fix CVE-2020-35475
To remediate CVE-2020-35475, upgrade the affected package to a fixed version below.
- —upgrade to 1.35.1 or later
- —upgrade to 1:1.35.1-1 or later
- —upgrade to 1:1.31.12-1~deb10u1 or later
Is CVE-2020-35475 being exploited?
Low — EPSS is 0.6%, meaning exploitation activity has not been observed at scale.
Affected packages (3)
- from 0, < 1.35.1
- from 0, < 1:1.35.1-1
- from 0, < 1:1.31.12-1~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:H/I:N/A:N |
References (6)
- ADVISORYsecurity-tracker.debian.org/tracker/CVE-2020-35475
- WEBlists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/STT5Z4A3BCXVH3WIPICWU2FP4IPIMUPC/
- WEBlists.wikimedia.org/pipermail/mediawiki-announce/2020-December/000268.html
- WEBnvd.nist.gov/vuln/detail/CVE-2020-35475