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 includes/htmlform/fields/HTMLMultiSelectField.Php. This issue affects MediaWiki: before 1.39.12, 1.42.6, 1.43.1.

According to its self-reported version number, the instance of MediaWiki hosted on the remote web server is prior to 1.39.12, 1.42.x prior to 1.42.6 or 1.43.x prior to 1.43.1. It is, therefore, affected by a number of vulnerabilities as follows.

- Improper restrictions on the file revert action. (CVE-2025-32696)

- PermissionManager fails to differentiate between cascading protection sources, allowing an unauthorized user to edit protected pages. (CVE-2025-32697)

- LogPager restriction enforcement functions do not properly restrict access to suppressed log entries. (CVE-2025-32698)

- Potential JavaScript injection via Unicode normalization enabling XSS attacks. (CVE-2025-32699)

- An i18n XSS vulnerability in HTMLMultiSelectField with sections. (CVE-2025-3469)

- AbuseFilter log interfaces expose private/hidden filters when they should be restricted. (CVE-2025-32700)

Note that the scanner 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     includes/htmlform/fields/HTMLMultiSelectField.Php. This issue affects MediaWiki: before 1.39.12, 1.42.6,     1.43.1. (CVE-2025-3469)

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

The remote Debian 11 host has packages installed that are affected by multiple vulnerabilities as referenced in the dla-4249 advisory.

    -------------------------------------------------------------------------     Debian LTS Advisory DLA-4249-1                debian-lts@lists.debian.org     https://www.debian.org/lts/security/                       Guilhem Moulin     July 23, 2025                                 https://wiki.debian.org/LTS
    -------------------------------------------------------------------------

    Package        : mediawiki     Version        : 1:1.35.13-1+deb11u4     CVE ID         : CVE-2025-3469 CVE-2025-6590 CVE-2025-6591 CVE-2025-6593                      CVE-2025-6594 CVE-2025-6595 CVE-2025-6597 CVE-2025-6926                      CVE-2025-32072 CVE-2025-32696 CVE-2025-32698 CVE-2025-32699

    Multiple security vulnerabilities were found in mediawiki, a website     engine for collaborative work, that could lead to information     disclosure or privilege escalation.

    CVE-2025-3469

        User input was not properly sanitized during web page generation,         which could lead to information disclosure or privilege escalation         via Cross-site Scripting.

    CVE-2025-6590

        User input was not sanitized in the password reset form, which could lead         to information disclosure for private pages via transclusion.

    CVE-2025-6591

        HTML injection in API `action=feedcontributions` output from i18n         messages.

    CVE-2025-6593

        {{SITENAME}} registered email address has been changed email was         sent to unverified email addresses, which could lead to information         disclosure.

    CVE-2025-6594

        XSS in Special:ApiSandbox.  While the known issue is not exploitable         in 1.39, the backported changes provide some security hardening         just in case.

    CVE-2025-6595

        Stored XSS through system messages in MultimediaViewer.

    CVE-2025-6597

        Autocreation was treated as login for the purposes of security         reauthentication.  However it doesn't necessarily involve real-time         user identification, as it can be based on some provider identifying         the user based on a session cookie or similar low-fidelity         information.  An attacker who got hold of a CentralAuth session         cookie (valid on any wiki) could just visit a wiki where the user         has no local account yet, get an account autocreated, and then         change credentials or perform other sensitive operations.

    CVE-2025-6926

        Allow extensions to suppress the reauth flag on login.  This is a         workaround for extensions with some sort of autologin implemented         via the login page to indicate that the login flow didn't involve         the user actually logging in, it merely copied some central login         state, and so isn't appropriate for the reauthentication flag.

    CVE-2025-32072

        HTML injection in feed output from i18n message.

    CVE-2025-32696

         reupload-own restriction could be bypassed by reverting file.

    CVE-2025-32698

        Improper enforcing of suppression restrictions in LogPager.php.

    CVE-2025-32699

        Potential javascript injection attack enabled by Unicode         normalization in Action API.

    For Debian 11 bullseye, these problems have been fixed in version     1:1.35.13-1+deb11u4.

    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.

The remote Debian 12 host has packages installed that are affected by multiple vulnerabilities as referenced in the dsa-5901 advisory.

    - -------------------------------------------------------------------------     Debian Security Advisory DSA-5901-1                   security@debian.org     https://www.debian.org/security/                       Moritz Muehlenhoff     April 13, 2025                        https://www.debian.org/security/faq
    - -------------------------------------------------------------------------

    Package        : mediawiki     CVE ID         : CVE-2025-3469 CVE-2025-32696 CVE-2025-32697                      CVE-2025-32698 CVE-2025-32699 CVE-2025-32700

    Multiple security issues were discovered in MediaWiki, a website engine     for collaborative work, which could result in information disclosure,     cross-site scripting or restriction bypass.

    For the stable distribution (bookworm), these problems have been fixed in     version 1:1.39.12-1~deb12u1.

    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.

ID	Name	Product	Family	Type	Severity
115343	MediaWiki 1.43.x < 1.43.1 Multiple Vulnerabilities	Web App Scanning	Component Vulnerability	Version Based	low
115342	MediaWiki 1.42.x < 1.42.6 Multiple Vulnerabilities	Web App Scanning	Component Vulnerability	Version Based	low
115341	MediaWiki < 1.39.12 Multiple Vulnerabilities	Web App Scanning	Component Vulnerability	Version Based	low
245923	Linux Distros Unpatched Vulnerability : CVE-2025-3469	Nessus	Misc.	Local	medium
242647	Debian dla-4249 : mediawiki - security update	Nessus	Debian Local Security Checks	Local	medium
234245	Debian dsa-5901 : mediawiki - security update	Nessus	Debian Local Security Checks	Local	low

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