Wikimedia ApprovedRevs Extension 1.39/1.43/1.44/1.45 on Mediawiki escape output

CVSS Meta Temp Score
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CTI Interest Score
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5.3$0-$5k0.00

Summaryinfo

A vulnerability identified as critical has been detected in Wikimedia ApprovedRevs Extension 1.39/1.43/1.44/1.45 on Mediawiki. Affected by this issue is some unknown functionality. Performing a manipulation results in escape output. This vulnerability is cataloged as CVE-2026-22712. It is possible to initiate the attack remotely. There is no exploit available.

Detailsinfo

A vulnerability classified as critical has been found in Wikimedia ApprovedRevs Extension 1.39/1.43/1.44/1.45 on Mediawiki. This affects some unknown functionality. The manipulation with an unknown input leads to a escape output vulnerability. CWE is classifying the issue as CWE-116. The product prepares a structured message for communication with another component, but encoding or escaping of the data is either missing or done incorrectly. As a result, the intended structure of the message is not preserved. This is going to have an impact on confidentiality, integrity, and availability. The summary by CVE is:

Improper Encoding or Escaping of Output due to magic word replacement in ParserAfterTidy vulnerability in The Wikimedia Foundation Mediawiki - ApprovedRevs Extension allows Input Data Manipulation.This issue affects Mediawiki - ApprovedRevs Extension: 1.45, 1.44, 1.43, 1.39.

The weakness was shared by SomeRandomDeveloper. The advisory is shared at phabricator.wikimedia.org. This vulnerability is uniquely identified as CVE-2026-22712 since 01/09/2026. The exploitability is told to be easy. It is possible to initiate the attack remotely. No form of authentication is needed for exploitation. It demands that the victim is doing some kind of user interaction. Neither technical details nor an exploit are publicly available. The price for an exploit might be around USD $0-$5k at the moment (estimation calculated on 02/12/2026).

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

The vulnerability is also documented in the databases at CNNVD (CNNVD-202601-1580), EUVD (EUVD-2026-1819) and CERT Bund (WID-SEC-2026-0053). Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

Affected

  • Open Source MediaWiki

Productinfo

Type

Vendor

Name

Version

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CNA CVSS-B Score: 🔒
CNA CVSS-BT Score: 🔒
CNA Vector: 🔒

CVSSv3info

VulDB Meta Base Score: 5.3
VulDB Meta Temp Score: 5.3

VulDB Base Score: 6.3
VulDB Temp Score: 6.3
VulDB Vector: 🔒
VulDB Reliability: 🔍

NVD Base Score: 4.3
NVD Vector: 🔒

CVSSv2info

AVACAuCIA
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VectorComplexityAuthenticationConfidentialityIntegrityAvailability
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VulDB Base Score: 🔒
VulDB Temp Score: 🔒
VulDB Reliability: 🔍

Exploitinginfo

Class: Escape output
CWE: CWE-116 / CWE-74 / CWE-707
CAPEC: 🔒
ATT&CK: 🔒

Physical: No
Local: No
Remote: Yes

Availability: 🔒
Status: Not defined

EPSS Score: 🔒
EPSS Percentile: 🔒

Price Prediction: 🔍
Current Price Estimation: 🔒

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Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: no mitigation known
Status: 🔍

0-Day Time: 🔒

Timelineinfo

01/09/2026 Advisory disclosed
01/09/2026 +0 days CVE reserved
01/09/2026 +0 days VulDB entry created
02/12/2026 +34 days VulDB entry last update

Sourcesinfo

Advisory: phabricator.wikimedia.org
Researcher: SomeRandomDeveloper
Status: Confirmed

CVE: CVE-2026-22712 (🔒)
GCVE (CVE): GCVE-0-2026-22712
GCVE (VulDB): GCVE-100-340209
EUVD: 🔒
CERT Bund: WID-SEC-2026-0053 - MediaWiki: Mehrere Schwachstellen
CNNVD: CNNVD-202601-1580 - Mediawiki - ApprovedRevs Extension 安全漏洞

Entryinfo

Created: 01/09/2026 01:26
Updated: 02/12/2026 19:30
Changes: 01/09/2026 01:26 (66), 01/09/2026 15:19 (6), 01/09/2026 23:15 (7), 01/10/2026 15:13 (1), 01/10/2026 15:58 (1), 01/11/2026 21:46 (1), 02/12/2026 19:30 (11)
Complete: 🔍
Cache ID: 216::103

Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

Discussion

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