Debian dla-4640 : mediawiki - security update

medium Nessus Plugin ID 321929

Synopsis

The remote Debian host is missing one or more security-related updates.

Description

The remote Debian 11 host has packages installed that are affected by multiple vulnerabilities as referenced in the dla-4640 advisory.

------------------------------------------------------------------------- Debian LTS Advisory DLA-4640-1 [email protected] https://www.debian.org/lts/security/ Guilhem Moulin June 22, 2026 https://wiki.debian.org/LTS
-------------------------------------------------------------------------

Package : mediawiki Version : 1:1.35.13-1+deb11u7 $bookworm_VERSION CVE ID : CVE-2026-34087 CVE-2026-34088 CVE-2026-34093 CVE-2026-34095

Multiple security vulnerabilities were found in mediawiki, a website engine for collaborative work, which could lead to information disclosure or access controls bypass.

CVE-2026-34087

OATHAuth extension: Users API leaks whether privileged users have their user groups disabled for lack of 2FA.

CVE-2026-34088

RecentChanges entries expose suppressed content via generated log page HTML.

CVE-2026-34093

Special:UserRights page allows viewing user rights from private wiki.

CVE-2026-34095

action=raw with Special:Mypage subpage title responds with Content-Type: text/html on ctype=text/javascript request, which may lead to cross-site scripting.

For Debian 11 bullseye, these problems have been fixed in version 1:1.35.13-1+deb11u7.

For Debian 12 bookworm, these problems have been fixed in version $bookworm_VERSION.

We recommend that you upgrade your mediawiki packages.

For the detailed security status of mediawiki please refer to its security tracker page at:
https://security-tracker.debian.org/tracker/mediawiki

Further information about Debian LTS security advisories, how to apply these updates to your system and frequently asked questions can be found at: https://wiki.debian.org/LTS Attachment:
signature.asc Description: PGP signature

Tenable has extracted the preceding description block directly from the Debian security advisory.

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

Solution

Upgrade the mediawiki packages.

Plugin Details

Severity: Medium

ID: 321929

File Name: debian_DLA-4640.nasl

Version: 1.1

Type: Local

Agent: unix

Family: Debian Local Security Checks

Published: 6/22/2026

Updated: 6/22/2026

Supported Sensors: Nessus Agent, Continuous Assessment, Nessus

Risk Information

VPR

Risk Factor: Low

Score: 3.6

CVSS v2

Risk Factor: High

Base Score: 7.8

Temporal Score: 5.8

Vector: CVSS2#AV:N/AC:L/Au:N/C:C/I:N/A:N

CVSS Score Source: CVE-2026-34088

CVSS v3

Risk Factor: High

Base Score: 7.5

Temporal Score: 6.5

Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

Temporal Vector: CVSS:3.0/E:U/RL:O/RC:C

CVSS v4

Risk Factor: Medium

Base Score: 5.3

Threat Score: 1.3

Threat Vector: CVSS:4.0/E:U

Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N

Vulnerability Information

CPE: cpe:/o:debian:debian_linux:11.0, p-cpe:/a:debian:debian_linux:mediawiki, p-cpe:/a:debian:debian_linux:mediawiki-classes

Required KB Items: Host/local_checks_enabled, Host/Debian/release, Host/Debian/dpkg-l

Exploit Ease: No known exploits are available

Patch Publication Date: 6/22/2026

Vulnerability Publication Date: 5/11/2026

Reference Information

CVE: CVE-2026-34087, CVE-2026-34088, CVE-2026-34093, CVE-2026-34095

Detections

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