Access Control Flaw in ReplaceText Extension for MediaWiki
CVE-2021-41801

8.8HIGH

Key Information:

Vendor

Mediawiki
Status
Mediawiki
Vendor
CVE Published:
11 October 2021

Badges

👾 Exploit Exists

What is CVE-2021-41801?

The ReplaceText extension in MediaWiki versions up to 1.41 contains an access control vulnerability that allows submitted replace jobs to be executed even after a user is blocked. When a user submits a replace job, and subsequently gets blocked, the job may still be processed later due to a backlog in the job queue. This behavior can lead to unauthorized modifications to content, posing a security risk for MediaWiki installations. Remediation and updates are advised to mitigate this issue.

References

https://phabricator.wikimedia.org/T279090
x_refsource_MISC
https://lists.wikimedia.org/hyperkitty/list/wikitech-l%40...
x_refsource_CONFIRM

CVSS V3.1

Score:
8.8
Severity:
HIGH
Confidentiality:
High
Integrity:
High
Availability:
High
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
Low
User Interaction:
None
Scope:
Unchanged

Timeline

  • 🟡

    Public PoC available

  • 👾

    Exploit known to exist

  • Vulnerability published

  • Vulnerability Reserved

.