CVE-2020-26121 Missing authorization in n/a

What is CVE-2020-26121?

CVE-2020-26121 is a high-severity missing authorization vulnerability in Fedoraproject Fedora, published on 27 Sep 2020. An attacker can exploit it over the internet without logging in, with no action from the victim.

Official 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.

Weakness: CWE-863

Which versions are affected by CVE-2020-26121?

1 open source package ship an affected version, including mediawiki. It affects 2 products.

Products include Fedoraproject Fedora, Mediawiki Mediawiki.

How do I fix CVE-2020-26121?

Upgrade mediawiki to 1.34.4 or later.

Upgrade, and check permissions on every request on the server, not only in the interface. More about Missing authorization.

Is CVE-2020-26121 being exploited?

There is no known exploitation of CVE-2020-26121 in the wild and no public exploit code.

Other vulnerabilities in Fedoraproject Fedora

• CVE-2024-4577 PHP-CGI OS Command Injection Exploited Critical 9.8
• CVE-2021-39226 Grafana Authentication Bypass Exploited Critical 9.8
• CVE-2019-5544 VMware ESXi and Horizon DaaS OpenSLP Heap-Based Buffer Overflow Exploited Critical 9.8
• CVE-2024-4947 Google Chromium V8 Type Confusion Exploited Critical 9.6
• CVE-2024-4671 Google Chromium Visuals Use-After-Free Exploited Critical 9.6

All Fedoraproject Fedora vulnerabilities

Sources

• CVE record
• NVD
• OSV
• GitHub advisory
• How this page is made

Also known as BIT-mediawiki-2020-26121, GHSA-2pxh-883j-pqvh.