CVE-2020-26121

Severity Score

7.5

*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 the FileImporter extension for MediaWiki before 1.34.4. An attacker can import a file even when the target page is protected against "page creation" and the attacker should not be able to create it. This occurs because of a mishandled distinction between an upload restriction and a create restriction. An attacker cannot leverage this to overwrite anything, but can leverage this to force a wiki to have a page with a disallowed title.

Se detectó un problema en la extensión FileImporter para MediaWiki versiones anteriores a 1.34.4. Un atacante puede importar un archivo incluso cuando la página de destino está protegida contra "page creation" y el atacante no debería poder crearlo. Esto ocurre debido a una distinción manejada inapropiadamente entre una restricción de carga y una restricción de creación. Un atacante no puede aprovechar esto para sobrescribir cualquier cosa, pero puede aprovechar esto para obligar a un wiki a tener una página con un título no permitido

*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

2020-09-27 CVE Reserved
2020-09-27 CVE Published
2024-08-01 EPSS Updated
2024-08-04 CVE Updated
---------- Exploited in Wild
---------- KEV Due Date
---------- First Exploit

CWE

CWE-863: Incorrect Authorization

CAPEC

References (4)

URL	Tag	Source

URL	Date	SRC

URL	Date	SRC
https://gerrit.wikimedia.org/r/q/Ib852a96afc4dca10516d0510e69c10f9892b351b	2023-11-07
https://phabricator.wikimedia.org/T262628	2023-11-07

URL	Date	SRC
https://commons.wikimedia.org/w/index.php?oldid=454609892#File:Wiki.png	2023-11-07
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/RTTPZ7XMDS66I442OLLHXBDNP2LCBJU6	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"				< 1.34.4 Search vendor "Mediawiki" for product "Mediawiki" and version " < 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