CVE-2021-35197

Gentoo Linux Security Advisory 202107-40

Severity Score

7.5

*CVSS v3.1

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

*Multiple Sources

Exploited in Wild

*KEV

Decision

*SSVC

Descriptions

In MediaWiki before 1.31.15, 1.32.x through 1.35.x before 1.35.3, and 1.36.x before 1.36.1, bots have certain unintended API access. When a bot account has a "sitewide block" applied, it is able to still "purge" pages through the MediaWiki Action API (which a "sitewide block" should have prevented).

En MediaWiki versiones anteriores a 1.31.15, versiones 1.32.x hasta 1.35.x, versiones anteriores a 1.35.3, y versiones 1.36.x anteriores a 1.36.1, unos bots presentan determinados accesos a la API no deseados. Cuando una cuenta de bot presenta un "sitewide block" aplicado, es capaz de "purge" páginas mediante la API de acción de MediaWiki (lo que un "bloqueo del sitio" debería haber impedido)

Multiple security issues were found in MediaWiki, a website engine for collaborative work, which could result in cross-site scripting, denial of service and a bypass of restrictions in the "Replace Text" extension.

*Credits: N/A

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

None

Scope

Unchanged

Confidentiality

None

Integrity

High

Availability

None

Attack Vector

Network

Attack Complexity

Low

Authentication

None

Confidentiality

None

Integrity

Partial

Availability

None

* Common Vulnerability Scoring System

SSVC

Decision:-

Exploitation

Automatable

Tech. Impact

* Organization's Worst-case Scenario

Timeline

2021-06-22 CVE Reserved
2021-07-02 CVE Published
2024-08-04 CVE Updated
2024-08-04 First Exploit
2025-03-30 EPSS Updated
---------- Exploited in Wild
---------- KEV Due Date

CWE

CWE-863: Incorrect Authorization

CAPEC

References (8)

URL	Tag	Source
https://lists.debian.org/debian-lts-announce/2021/10/msg00003.html	Mailing List
https://lists.wikimedia.org/hyperkitty/list/mediawiki-announce%40lists.wikimedia.org/thread/YR3X4L2CPSEJVSY543AWEO65TD6APXHP	X_refsource_confirm

URL	Date	SRC
https://phabricator.wikimedia.org/T280226	2024-08-04

URL	Date	SRC

URL	Date	SRC
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/CJDYJQWT43GBD6GNQ4OW7JOZ6WQ6DZTN	2023-11-07
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/MDBPECBWN6LWNSWIQMVXK6PP4YFEUYHA	2023-11-07
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/QNEAI2T3Y65I55ZB6UE6RMC662RZTGRX	2023-11-07
https://security.gentoo.org/glsa/202107-40	2023-11-07
https://www.debian.org/security/2021/dsa-4979	2023-11-07

Affected Vendors, Products, and Versions

Vendor		Product				Version		Other		Status
Vendor	Product	Version	Other	Status	<-- -->	Vendor	Product	Version	Other	Status
Mediawiki Search vendor "Mediawiki"		Mediawiki Search vendor "Mediawiki" for product "Mediawiki"				< 1.31.15 Search vendor "Mediawiki" for product "Mediawiki" and version " < 1.31.15"		-		Affected
Mediawiki Search vendor "Mediawiki"		Mediawiki Search vendor "Mediawiki" for product "Mediawiki"				>= 1.32.0 < 1.35.3 Search vendor "Mediawiki" for product "Mediawiki" and version " >= 1.32.0 < 1.35.3"		-		Affected
Mediawiki Search vendor "Mediawiki"		Mediawiki Search vendor "Mediawiki" for product "Mediawiki"				>= 1.36.0 < 1.36.1 Search vendor "Mediawiki" for product "Mediawiki" and version " >= 1.36.0 < 1.36.1"		-		Affected
Debian Search vendor "Debian"		Debian Linux Search vendor "Debian" for product "Debian Linux"				9.0 Search vendor "Debian" for product "Debian Linux" and version "9.0"		-		Affected
Debian Search vendor "Debian"		Debian Linux Search vendor "Debian" for product "Debian Linux"				10.0 Search vendor "Debian" for product "Debian Linux" and version "10.0"		-		Affected
Debian Search vendor "Debian"		Debian Linux Search vendor "Debian" for product "Debian Linux"				11.0 Search vendor "Debian" for product "Debian Linux" and version "11.0"		-		Affected
Fedoraproject Search vendor "Fedoraproject"		Fedora Search vendor "Fedoraproject" for product "Fedora"				33 Search vendor "Fedoraproject" for product "Fedora" and version "33"		-		Affected
Fedoraproject Search vendor "Fedoraproject"		Fedora Search vendor "Fedoraproject" for product "Fedora"				34 Search vendor "Fedoraproject" for product "Fedora" and version "34"		-		Affected
Fedoraproject Search vendor "Fedoraproject"		Fedora Search vendor "Fedoraproject" for product "Fedora"				35 Search vendor "Fedoraproject" for product "Fedora" and version "35"		-		Affected