According to its self-reported version number, the instance of MediaWiki hosted on the remote web server is prior to 1.39.16, 1.43.x prior to 1.43.6, 1.44.x prior to 1.44.3 or 1.45.x prior to 1.45.1. It is, therefore, affected by a number of vulnerabilities as follows.

- The xslt option is enabled by default in API format=xml responses. (CVE-2025-67484)

- Failure to escape the word-separator message in Special:ApiSandbox. (CVE-2025-67477)

- Failure to escape square brackets in autocomment links. (CVE-2025-67475)

- The importer's IP is used in case of an external revision author, leading to information disclosure. (CVE-2025-67476)

- Failure to always escape commas in mail encoded-words. (CVE-2025-67478)

- The Sanitizer does not disallow underscore and wide underscore in data-* attribute names. (CVE-2025-67479)

- Missing read permission check in ApiQueryRevisionsBase enabling an access control bypass. (CVE-2025-67480)

- Failure to escape the 'comma-separator' between multiple protection levels. (CVE-2025-67483)

- The 'style' attribute is allowed in client-side messages (jqueryMsg), enabling XSS. (CVE-2025-67481)

- A Lua segfault in unpack() leading to a denial of service. (CVE-2025-67482)

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

The remote Debian 12 / 13 host has packages installed that are affected by multiple vulnerabilities as referenced in the dsa-6085 advisory.

    - -------------------------------------------------------------------------     Debian Security Advisory DSA-6085-1                   security@debian.org     https://www.debian.org/security/                       Moritz Muehlenhoff     December 19, 2025                     https://www.debian.org/security/faq
    - -------------------------------------------------------------------------

    Package        : mediawiki     CVE ID         : CVE-2025-11173 CVE-2025-11261 CVE-2025-61635 CVE-2025-61638                      CVE-2025-61639 CVE-2025-61640 CVE-2025-61641 CVE-2025-61643                      CVE-2025-61646 CVE-2025-61653 CVE-2025-61655 CVE-2025-61656                      CVE-2025-67475 CVE-2025-67478 CVE-2025-67479 CVE-2025-67480                      CVE-2025-67481 CVE-2025-67482 CVE-2025-67484 CVE-2025-67483                      CVE-2025-67477 CVE-2025-61657 CVE-2025-61654 CVE-2025-61652                      CVE-2025-61642 CVE-2025-61637 CVE-2025-61636 CVE-2025-61634                      CVE-2025-11175

    Multiple security issues were discovered in MediaWiki, a website engine for     collaborative work, which could result in cross-site scripting, information     disclosure, missing rate limiting or denial of service.

    For the oldstable distribution (bookworm), these problems have been fixed     in version 1:1.39.17-1~deb12u1.

    For the stable distribution (trixie), these problems have been fixed in     version 1:1.43.6+dfsg-1~deb13u1.

    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 Security Advisories, how to apply     these updates to your system and frequently asked questions can be     found at: https://www.debian.org/security/

    Mailing list: debian-security-announce@lists.debian.org

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.

The Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available.

  - Improper Neutralization of Input During Web Page Generation (XSS or 'Cross-site Scripting') vulnerability     in Wikimedia Foundation MediaWiki. This vulnerability is associated with program files     resources/src/mediawiki.Special.Apisandbox/ApiSandboxLayout.Js. This issue affects MediaWiki: from *     before 1.44.3, 1.45.1. (CVE-2025-67477)

Note that Nessus relies on the presence of the package as reported by the vendor.

ID	Name	Product	Family	Published	Updated	Severity
115328	MediaWiki < 1.39.16 Multiple Vulnerabilities	Web App Scanning	Component Vulnerability	7/28/2026	7/28/2026	medium
115331	MediaWiki 1.45.x < 1.45.1 Multiple Vulnerabilities	Web App Scanning	Component Vulnerability	7/28/2026	7/28/2026	medium
115329	MediaWiki 1.43.x < 1.43.6 Multiple Vulnerabilities	Web App Scanning	Component Vulnerability	7/28/2026	7/28/2026	medium
115330	MediaWiki 1.44.x < 1.44.3 Multiple Vulnerabilities	Web App Scanning	Component Vulnerability	7/28/2026	7/28/2026	medium
279440	Debian dsa-6085 : mediawiki - security update	Nessus	Debian Local Security Checks	12/19/2025	3/17/2026	high
278374	Linux Distros Unpatched Vulnerability : CVE-2025-67477	Nessus	Misc.	12/11/2025	9/2/2026	medium

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