CVE-2021-31554 Auth bypass in n/a
Attackers can bypass account blocks in MediaWiki's AbuseFilter extension, allowing malicious users to remain active despite being blocked.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2021-31554?
CVE-2021-31554 is a medium-severity authentication bypass vulnerability in Mediawiki Mediawiki, published on 22 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 the AbuseFilter extension for MediaWiki through 1.35.2. It improperly handled account blocks for certain automatically created MediaWiki user accounts, thus allowing nefarious users to remain unblocked.
Weakness: CWE-863
Which versions are affected by CVE-2021-31554?
1 open source package ship an affected version, including mediawiki. It affects 1 product.
| Package | Affected | Fixed in |
|---|---|---|
mediawiki Bitnami | All versions | 1.35.3 |
Products include Mediawiki Mediawiki.
How do I fix CVE-2021-31554?
Upgrade mediawiki to 1.35.3 or later.
Upgrade, and rotate credentials and sessions that may have been exposed. More about Authentication bypass.
Is CVE-2021-31554 being exploited?
There is no known exploitation of CVE-2021-31554 in the wild and no public exploit code.
Other vulnerabilities in Mediawiki Mediawiki
Sources
Also known as BIT-mediawiki-2021-31554, GHSA-j4g8-vqq3-7h58.