Wikimedia MediaWiki up to 1.43.6/1.44.3/1.45.1 SpecialUserRights.Php information disclosure

CVSS Meta Temp Score
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Current Exploit Price (≈)
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CTI Interest Score
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4.3$0-$5k0.00

Summaryinfo

A vulnerability marked as problematic has been reported in Wikimedia MediaWiki up to 1.43.6/1.44.3/1.45.1. This affects an unknown function of the file includes/Specials/SpecialUserRights.Php. Performing a manipulation results in information disclosure. This vulnerability is reported as CVE-2026-34093. The attack is possible to be carried out remotely. No exploit exists. It is suggested to upgrade the affected component.

Detailsinfo

A vulnerability, which was classified as problematic, was found in Wikimedia MediaWiki up to 1.43.6/1.44.3/1.45.1. This affects an unknown code of the file includes/Specials/SpecialUserRights.Php. The manipulation with an unknown input leads to a information disclosure vulnerability. CWE is classifying the issue as CWE-200. The product exposes sensitive information to an actor that is not explicitly authorized to have access to that information. This is going to have an impact on confidentiality. The summary by CVE is:

Exposure of Sensitive Information to an Unauthorized Actor vulnerability in Wikimedia Foundation MediaWiki. This vulnerability is associated with program files includes/Specials/SpecialUserRights.Php. This issue affects MediaWiki: from * before 1.43.7, 1.44.4, 1.45.2.

It is possible to read the advisory at phabricator.wikimedia.org. This vulnerability is uniquely identified as CVE-2026-34093 since 03/25/2026. The exploitability is told to be easy. It is possible to initiate the attack remotely. It demands that the victim is doing some kind of user interaction. Technical details of the vulnerability are known, but there is no available exploit. The attack technique deployed by this issue is T1592 according to MITRE ATT&CK.

By approaching the search of inurl:includes/Specials/SpecialUserRights.Php it is possible to find vulnerable targets with Google Hacking. The vulnerability scanner Nessus provides a plugin with the ID 321929 (Debian dla-4640 : mediawiki - security update), which helps to determine the existence of the flaw in a target environment.

Upgrading to version 1.43.7, 1.44.4 or 1.45.2 eliminates this vulnerability.

The vulnerability is also documented in the vulnerability database at Tenable (321929). Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

Productinfo

Type

Vendor

Name

Version

License

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: 4.4
VulDB Meta Temp Score: 4.3

VulDB Base Score: 3.5
VulDB Temp Score: 3.4
VulDB Vector: 🔒
VulDB Reliability: 🔍

NVD Base Score: 5.3
NVD Vector: 🔒

CVSSv2info

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

Exploitinginfo

Class: Information disclosure
CWE: CWE-200 / CWE-284 / CWE-266
CAPEC: 🔒
ATT&CK: 🔒

Physical: No
Local: No
Remote: Yes

Availability: 🔒
Status: Not defined
Google Hack: 🔒

EPSS Score: 🔒
EPSS Percentile: 🔒

Price Prediction: 🔍
Current Price Estimation: 🔒

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Nessus ID: 321929
Nessus Name: Debian dla-4640 : mediawiki - security update

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔒

Upgrade: MediaWiki 1.43.7/1.44.4/1.45.2

Timelineinfo

03/25/2026 CVE reserved
05/11/2026 +46 days Advisory disclosed
05/11/2026 +0 days VulDB entry created
06/22/2026 +42 days VulDB entry last update

Sourcesinfo

Advisory: phabricator.wikimedia.org
Status: Confirmed

CVE: CVE-2026-34093 (🔒)
GCVE (CVE): GCVE-0-2026-34093
GCVE (VulDB): GCVE-100-362667

Entryinfo

Created: 05/11/2026 20:15
Updated: 06/22/2026 19:07
Changes: 05/11/2026 20:15 (70), 05/19/2026 01:06 (12), 06/22/2026 19:07 (2)
Complete: 🔍
Cache ID: 216::103

Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

Discussion

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