CVE-2020-25813 MediaWiki Special:UserRights exposes the existence of hidden users

What is CVE-2020-25813?

CVE-2020-25813 is a medium-severity 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

In MediaWiki before 1.31.10 and 1.32.x through 1.34.x before 1.34.4, Special:UserRights exposes the existence of hidden users.

Which versions are affected by CVE-2020-25813?

5 open source packages ship an affected version, including mediawiki/core and mediawiki. It affects 2 products.

Products include Fedoraproject Fedora, Mediawiki Mediawiki.

How do I fix CVE-2020-25813?

Upgrade mediawiki/core to a fixed version for your release line: 1.31.9 or 1.34.3.

Is CVE-2020-25813 being exploited?

There is no known exploitation of CVE-2020-25813 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-2020-25813, DEBIAN-CVE-2020-25813, GHSA-c4rj-wrmq-52rj, UBUNTU-CVE-2020-25813.