CVE-2020-26121
7.5
HIGH
CVSS 3.1
EPSS 0.16%
Description
An issue was discovered in the FileImporter extension for MediaWiki before 1.34.4. An attacker can import a file even when the target page is protected against "page creation" and the attacker should not be able to create it. This occurs because of a mishandled distinction between an upload restriction and a create restriction. An attacker cannot leverage this to overwrite anything, but can leverage this to force a wiki to have a page with a disallowed title.
How to fix CVE-2020-26121
To remediate CVE-2020-26121, upgrade the affected package to a fixed version below.
- —upgrade to 1.34.4 or later
Is CVE-2020-26121 being exploited?
Low — EPSS is 0.2%, meaning exploitation activity has not been observed at scale.
Affected packages (1)
- from 0, < 1.34.4
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 |
References (5)
- WEBcommons.wikimedia.org/w/index.php?oldid=454609892#File:Wiki.png
- WEBgerrit.wikimedia.org/r/q/Ib852a96afc4dca10516d0510e69c10f9892b351b
- WEBlists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/RTTPZ7XMDS66I442OLLHXBDNP2LCBJU6/
- WEBnvd.nist.gov/vuln/detail/CVE-2020-26121