CVE-2021-31549 Information disclosure in n/a
Unprivileged users can view suppressed MediaWiki usernames via the AbuseFilter examine form, exposing private user data.
- 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-2021-31549?
CVE-2021-31549 is a medium-severity 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. The Special:AbuseFilter/examine form allowed for the disclosure of suppressed MediaWiki usernames to unprivileged users.
Weakness: CWE-200
Which versions are affected by CVE-2021-31549?
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-2021-31549?
Upgrade mediawiki to 1.35.3 or later.
Is CVE-2021-31549 being exploited?
There is no known exploitation of CVE-2021-31549 in the wild and no public exploit code.
Other vulnerabilities in Mediawiki Mediawiki
Sources
Also known as BIT-mediawiki-2021-31549, GHSA-cg23-hq5c-fqvx.