CVE-2021-30156 Information disclosure in n/a

What is CVE-2021-30156?

CVE-2021-30156 is a medium-severity vulnerability in Fedoraproject Fedora, published on 9 Apr 2021. Any signed-in user can exploit it over the network, with no action from the victim.

Official description

An issue was discovered in MediaWiki before 1.31.12 and 1.32.x through 1.35.x before 1.35.2. Special:Contributions can leak that a "hidden" user exists.

Weakness: CWE-200

Which versions are affected by CVE-2021-30156?

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-2021-30156?

Upgrade mediawiki to a fixed version for your release line: 1.31.12 or 1.35.2.

Is CVE-2021-30156 being exploited?

There is no known exploitation of CVE-2021-30156 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-2021-30156, GHSA-4w3g-mpj2-j247, UBUNTU-CVE-2021-30156.