CVE-2021-30458

Gentoo Linux Security Advisory 202107-40

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 Wikimedia Parsoid before 0.11.1 and 0.12.x before 0.12.2. An attacker can send crafted wikitext that Utils/WTUtils.php will transform by using a <meta> tag, bypassing sanitization steps, and potentially allowing for XSS.

Se detectó un problema en Wikimedia Parsoid versiones anteriores a 0.11.1 y versiones 0.12.x anteriores a 0.12.2. Un atacante puede enviar wikitexto diseñado que el archivo Utils/WTUtils.php transformará mediante el uso de una etiqueta (meta), omitiendo los pasos de saneamiento y potencialmente permitiendo un ataque de tipo XSS

Multiple vulnerabilities have been found in MediaWiki, the worst of which could result in a Denial of Service condition. Versions less than 1.36.1 are affected.

*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

2021-04-08 CVE Reserved
2021-04-09 CVE Published
2024-08-03 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 (3)

URL	Tag	Source

URL	Date	SRC

URL	Date	SRC

URL	Date	SRC
https://phabricator.wikimedia.org/T279451	2021-12-08
https://security.gentoo.org/glsa/202107-40	2021-12-08
https://www.mediawiki.org/wiki/Parsoid	2021-12-08

Affected Vendors, Products, and Versions

Vendor		Product				Version		Other		Status
Vendor	Product	Version	Other	Status	<-- -->	Vendor	Product	Version	Other	Status
Wikimedia Search vendor "Wikimedia"		Parsoid Search vendor "Wikimedia" for product "Parsoid"				< 0.11.1 Search vendor "Wikimedia" for product "Parsoid" and version " < 0.11.1"		node.js		Affected
Wikimedia Search vendor "Wikimedia"		Parsoid Search vendor "Wikimedia" for product "Parsoid"				>= 0.12.0 < 0.12.2 Search vendor "Wikimedia" for product "Parsoid" and version " >= 0.12.0 < 0.12.2"		node.js		Affected