CVE-2025-62508

mediumpriority · track · 0EPSS 0.004 · 39 %ileDEEUUS

grimoire priorityP3 · Track

Exploitable?

—

no known exploitation

Likely / severe?

0.45% (39th) EPSS

CVSS 6.5 · medium

Is it mine?

30 products

Check your exposure

Who says so?

4 sources

cnnvd · enisa_euvd · cert_bund · osv

EPSS · scored 2026-10-27

Citizen is a MediaWiki skin that makes extensions part of the cohesive experience. Citizen from 3.3.0 to 3.9.0 are vulnerable to stored cross-site scripting in the sticky header button message handling. In stickyHeader.js the copyButtonAttributes function assigns innerHTML from a source element’s textContent when copying button labels. This causes escaped HTML in system message content (such as citizen-share, citizen-view-history, citizen-view-edit, and nstab-talk) to be interpreted as HTML in the sticky header, allowing injection of arbitrary script by a user with the ability to edit interface messages. The vulnerability allows a user with the editinterface right but without the editsitejs right (by default the sysop group has editinterface but may not have editsitejs) to execute arbitrary JavaScript in other users’ sessions, enabling unauthorized access to sensitive data or actions. The issue is fixed in 3.9.0.

cvss

Technical severity, 0–10. One row per scoring source.

6.5

010

base score 0–10 · higher = more severe · hover a vector to decode

v3.16.5mediumCVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:Nsecondary · ENISA EU

v3.16.5mediumCVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:Nsecondary · security-advisories@github.comexploitability 1.2 · impact 5.2

v3.16.5mediumCVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:Nsecondary · OSV

v3.16mediumCVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:N/E:Usecondary · CVSS-BT (t0sche)

ssvc

A stakeholder decision — act, attend, or track — from exploitation and impact.

Exploitation: poc · Automatable: no · Technical Impact: partialcoordinatorcisa_ssvcUS

weaknesses

The CWE weakness classes this flaw belongs to.

CWE-79USCWE-79US

affected products (30)

Products and version ranges known to be affected.

Open Source MediaWiki <1.39.14all versionscert_bundDE
Open Source MediaWiki <1.43.4all versionscert_bundDE
Open Source MediaWiki <1.44.1all versionscert_bundDE
Open Source MediaWiki AdvancedSearch Extension <1.39all versionscert_bundDE
Open Source MediaWiki Cargo extensionall versionscert_bundDEcpe:/a:mediawiki:mediawiki:cargo_extension
Open Source MediaWiki CentralAuth Extension <1.39all versionscert_bundDE
Open Source MediaWiki CirrusSearch Extension <1.43all versionscert_bundDE
Open Source MediaWiki Citizen <3.9.0all versionscert_bundDE
Open Source MediaWiki FlexDiagrams Extensionall versionscert_bundDEcpe:/a:mediawiki:mediawiki:flexdiagrams_extension
Open Source MediaWiki GrowthExperiments Extension <1.39all versionscert_bundDE
Open Source MediaWiki ImageRating Extension <1.39all versionscert_bundDE
Open Source MediaWiki PollNY extensionall versionscert_bundDEcpe:/a:mediawiki:mediawiki:pollny_extension
Open Source MediaWiki QuizGame extensionall versionscert_bundDEcpe:/a:mediawiki:mediawiki:quizgame_extension
Open Source MediaWiki SecurePoll Extensionall versionscert_bundDEcpe:/a:mediawiki:mediawiki:securepoll_extension
Open Source MediaWiki Skin:BlueSky Extension <1.39all versionscert_bundDE
Open Source MediaWiki UploadWizard Extension <1.39all versionscert_bundDE
Open Source MediaWiki WebAuthn extensionall versionscert_bundDEcpe:/a:mediawiki:mediawiki:webauthn_extension
Open Source MediaWiki≤ CirrusSearch Extension <1.43cert_bundDE
Open Source MediaWiki≤ Citizen <3.9.0cert_bundDE
Open Source MediaWiki≤ ImageRating Extension <1.39cert_bundDE

showing 20 of 30

advisories (2)

Vendor and ecosystem advisories describing this.

WID-SEC-W-2025-2336MediaWiki Extensions: Mehrere SchwachstellenDeutsch2025-10-19csaf · cert_bundDE
Ein Angreifer kann mehrere Schwachstellen in MediaWiki ausnutzen, um Cross-Site-Scripting-Angriffe durchzuführen, Daten zu manipulieren, vertrauliche Informationen offenzulegen oder einen Denial-of-Service-Zustand zu verursachen.
GHSA-g955-vw6w-v6ppCitizen vulnerable to stored XSS in sticky header button messages2025-10-20ghsa · osvUS
### Summary The JS implementation for copying button labels to the sticky header in the Citizen skin unescapes HTML characters, allowing for stored XSS through system messages. ### Details In the `copyButtonAttributes` function in `stickyHeader.js`, when copying the button labels, the `innerHTML` of the new element is set to the `textContent` of the old element: https://github.com/StarCitizenTools/mediawiki-skins-Citizen/blob/f4cbcecf5aca0ae69966b23d4983f9cb5033f319/resources/skins.citizen.scripts/stickyHeader.js#L29-L41 This unescapes any escaped HTML characters and causes the contents of the system messages to be interpreted as HTML. ### PoC 1. Edit any of the affected messages (`citizen-share`, `citizen-view-history`, `citizen-view-edit`, `nstab-talk`) to the following payload: `<img src="" onerror="alert('Sticky Header Button XSS')">`. 2. Visit any mainpage article in the wiki using the Citizen skin. <img width="495" height="228" alt="image" src="https://github.com/user-attachments/assets/ac75b8e1-b181-4335-9526-17d6b6f8518e" /> <img width="569" height="157" alt="image" src="https://github.com/user-attachments/assets/c052edb9-ff68-4869-9c66-3ec85e7ff68a" /> ### Impact This impacts wikis where a group has the `editinterface` but not the `editsitejs` user right. By default, this is the case for the `sysop` group.

also known as (3)

Other names and identifiers for this entity.

sources

Which sources assert this record, and when.

cnnvd enisa_euvd cert_bund osv NVD CVE.org MITRE

published 2025-10-17modified 2026-06-17

references (10)

External citations — patches, advisories, analysis.

scry

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