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Ubuntu 20.04 LTS / 22.04 LTS / 24.04 LTS : MediaWiki vulnerabilities (USN-8315-1)

medium Nessus Plugin ID 317472

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Synopsis

The remote Ubuntu host is missing one or more security updates.

Description

The remote Ubuntu 20.04 LTS / 22.04 LTS / 24.04 LTS host has packages installed that are affected by multiple vulnerabilities as referenced in the USN-8315-1 advisory.

 It was discovered that MediaWiki incorrectly handled group membership

 visibility in the OATHAuth extension. An authenticated attacker could

 use this issue to determine if other users had two-factor authentication

 enabled. (CVE-2026-34087)

 It was discovered that MediaWiki incorrectly handled suppressed log entry

 titles in the RecentChanges list. An unauthenticated attacker could use

 this issue to view titles of deleted or suppressed pages that should be hidden. (CVE-2026-34088)

 It was discovered that MediaWiki incorrectly handled resource loading timing information. An attacker could use this issue to determine if certain pages

 existed on a wiki. (CVE-2026-34092)

Tenable has extracted the preceding description block directly from the Ubuntu 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

Update the affected mediawiki and / or mediawiki-classes packages.

See Also

https://ubuntu.com/security/notices/USN-8315-1

Plugin Details

Severity: Medium

ID: 317472

File Name: ubuntu_USN-8315-1.nasl

Version: 1.1

Type: Local

Agent: unix

Published: 5/29/2026

Updated: 5/29/2026

Supported Sensors: Frictionless Assessment AWS, Frictionless Assessment Azure, Frictionless Assessment Agent, Nessus Agent, Agentless Assessment, Continuous Assessment, Nessus

Risk Information

VPR

Risk Factor: Medium

Score: 4.4

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-2026-34092

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

CVSS Score Source: CVE-2026-34088

Vulnerability Information

CPE: cpe:/o:canonical:ubuntu_linux:22.04:-:lts, cpe:/o:canonical:ubuntu_linux:24.04:-:lts, p-cpe:/a:canonical:ubuntu_linux:mediawiki, p-cpe:/a:canonical:ubuntu_linux:mediawiki-classes, cpe:/o:canonical:ubuntu_linux:20.04:-:lts

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

Exploit Ease: No known exploits are available

Patch Publication Date: 5/27/2026

Vulnerability Publication Date: 5/11/2026

Reference Information

CVE: CVE-2026-34087, CVE-2026-34088, CVE-2026-34092

USN: 8315-1