Improper access control in MediaWiki



Published: 2021-07-01
Risk Low
Patch available YES
Number of vulnerabilities 1
CVE-ID CVE-2021-35197
CWE-ID CWE-284
Exploitation vector Network
Public exploit N/A
Vulnerable software
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MediaWiki
Web applications / CMS

Vendor MediaWiki.org

Security Bulletin

This security bulletin contains one low risk vulnerability.

1) Improper access control

EUVDB-ID: #VU54499

Risk: Low

CVSSv3.1: 2.7 [CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:N/I:L/A:N/E:U/RL:O/RC:C]

CVE-ID: CVE-2021-35197

CWE-ID: CWE-284 - Improper Access Control

Exploit availability: No

Description

The vulnerability allows a remote attacker to gain unauthorized access to otherwise restricted functionality.

The vulnerability exists due to improper access restrictions to purge pages for blocked user accounts. A remote user with a blocked account can purge pages.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

MediaWiki: 1.31.0 - 1.36.0

External links

http://lists.wikimedia.org/hyperkitty/list/mediawiki-announce@lists.wikimedia.org/thread/YR3X4L2CPSEJVSY543AWEO65TD6APXHP/
http://phabricator.wikimedia.org/T280226
http://gerrit.wikimedia.org/r/plugins/gitiles/mediawiki/core/+/7fc84bbd23c1205e13c7a8332ab39e6ff52ca107%5E%21/


Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote authenticated user via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.



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