CVE-2021-31545 Information disclosure in n/a
The AbuseFilter extension leaks the existence of deleted usernames, allowing attackers to identify previously removed accounts.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2021-31545?
CVE-2021-31545 is a medium-severity vulnerability in Mediawiki Mediawiki, published on 22 Apr 2021. 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 AbuseFilter extension for MediaWiki through 1.35.2. The page_recent_contributors leaked the existence of certain deleted MediaWiki usernames, related to rev_deleted.
Weakness: CWE-200
Which versions are affected by CVE-2021-31545?
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-2021-31545?
Upgrade mediawiki to 1.35.3 or later.
Is CVE-2021-31545 being exploited?
There is no known exploitation of CVE-2021-31545 in the wild and no public exploit code.
Other vulnerabilities in Mediawiki Mediawiki
Sources
Also known as BIT-mediawiki-2021-31545, GHSA-gjvq-jhqf-q4gj.