CVE-2020-25812

Debian Security Advisory 4767-1

Severity Score

6.1

*CVSS v3.1

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

*Multiple Sources

Exploited in Wild

*KEV

Decision

*SSVC

Descriptions

An issue was discovered in MediaWiki 1.34.x before 1.34.4. On Special:Contributions, the NS filter uses unescaped messages as keys in the option key for an HTMLForm specifier. This is vulnerable to a mild XSS if one of those messages is changed to include raw HTML.

Se detectó un problema en MediaWiki desde 1.34.x anteriores a 1.34.4. En Special:Contributions, el filtro NS usa mensajes sin escape como claves en la clave de opción para un especificador HTMLForm. Esto es vulnerable a un ataque de tipo XSS leve si uno de esos mensajes es cambiado para incluir HTML sin formato

Multiple security issues were discovered in MediaWiki, a website engine existed or not, multiple code paths lacked HTML sanitisation allowing for cross-site scripting and TOTP validation applied insufficient rate limiting against brute force attempts.

*Credits: N/A

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

Required

Scope

Changed

Confidentiality

Low

Integrity

Low

Availability

None

Attack Vector

Network

Attack Complexity

Medium

Authentication

None

Confidentiality

None

Integrity

Partial

Availability

None

* Common Vulnerability Scoring System

SSVC

Decision:-

Exploitation

Automatable

Tech. Impact

* Organization's Worst-case Scenario

Timeline

2020-09-23 CVE Reserved
2020-09-27 CVE Published
2024-08-04 CVE Updated
2025-03-30 EPSS Updated
---------- Exploited in Wild
---------- KEV Due Date
---------- First Exploit

CWE

CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')

CAPEC

References (4)

URL	Tag	Source

URL	Date	SRC

URL	Date	SRC

URL	Date	SRC
https://gerrit.wikimedia.org/g/mediawiki/core/+/ad4a3ba45fb955aa8c0eb3c83809b16b40a498b9/includes/specials/SpecialContributions.php#592	2023-11-07
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/RTTPZ7XMDS66I442OLLHXBDNP2LCBJU6	2023-11-07
https://lists.wikimedia.org/pipermail/mediawiki-l/2020-September/048480.html	2023-11-07
https://lists.wikimedia.org/pipermail/mediawiki-l/2020-September/048488.html	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"				>= 1.34.0 < 1.34.4 Search vendor "Mediawiki" for product "Mediawiki" and version " >= 1.34.0 < 1.34.4"		-		Affected
Fedoraproject Search vendor "Fedoraproject"		Fedora Search vendor "Fedoraproject" for product "Fedora"				33 Search vendor "Fedoraproject" for product "Fedora" and version "33"		-		Affected