CVE-2025-61638

Sanitizer::validateAttributes data-XSS

0.0 NonePublic exploitFix available

Improper Neutralization of Input During Web Page Generation (XSS or 'Cross-site Scripting') vulnerability in Wikimedia Foundation MediaWiki, Wikimedia Foundation Parsoid. This vulnerability is associated with program files includes/parser/Sanitizer.Php, src/Core/Sanitizer.Php.

This issue affects MediaWiki: from * before 1.39.14, 1.43.4, 1.44.1; Parsoid: from * before 0.16.6, 0.20.4, 0.21.1.

Attack profile

How easy it is to exploit

Attack vector: Network
Complexity: Low
Privileges needed: Low
User interaction: Passive

What an attacker can affect

Confidentiality: None
Integrity: None
Availability: None

Exploit likelihood

0.27%Up 0.3 points since Feb 3, 2026

What each source reports

CVE List Score used 0.0

Sanitizer::validateAttributes data-XSS

This issue affects MediaWiki: from * before 1.39.14, 1.43.4, 1.44.1; Parsoid: from * before 0.16.6, 0.20.4, 0.21.1.

Record: CVE-2025-61638
CVSS 4.0: 0.0 NoneCVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:P/VC:N/VI:N/VA:N/SC:N/SI:N/SA:N/E:U
Weakness: CWE-79
Updated: 2026-11-02

EUVDEUVD-2025-206633 No score

This issue affects MediaWiki: from * before 1.39.14, 1.43.4, 1.44.1; Parsoid: from * before 0.16.6, 0.20.4, 0.21.1.

Record: EUVD-2025-206633
Updated: 2026-11-02

GitHub AdvisoriesGHSA-mq9h-r82m-hvhc 0.0

Improper Neutralization of Input During Web Page Generation (XSS or 'Cross-site Scripting')...

This issue affects MediaWiki: from * before 1.39.14, 1.43.4, 1.44.1; Parsoid: from * before 0.16.6, 0.20.4, 0.21.1.

Record: GHSA-mq9h-r82m-hvhc
CVSS 4.0: 0.0 NoneCVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:P/VC:N/VI:N/VA:N/SC:N/SI:N/SA:N/E:U/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
CVSS 3.1: 4.8 MediumCVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:C/C:L/I:L/A:N
Weakness: CWE-79
Updated: 2026-11-02

NVD 0.0

This issue affects MediaWiki: from * before 1.39.14, 1.43.4, 1.44.1; Parsoid: from * before 0.16.6, 0.20.4, 0.21.1.

Record: CVE-2025-61638
CVSS 4.0: 0.0 NoneCVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:P/VC:N/VI:N/VA:N/SC:N/SI:N/SA:N/E:U/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
CVSS 3.1: 4.8 MediumCVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:C/C:L/I:L/A:N
Weakness: CWE-79
Updated: 2026-11-02

OSV 4.8

This issue affects MediaWiki: from * before 1.39.14, 1.43.4, 1.44.1; Parsoid: from * before 0.16.6, 0.20.4, 0.21.1.

Record: CVE-2025-61638
CVSS 3.1: 4.8 MediumCVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:C/C:L/I:L/A:N
Updated: 2026-11-02

OSVDEBIAN-CVE-2025-61638 4.8

Record: DEBIAN-CVE-2025-61638
CVSS 3.1: 4.8 MediumCVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:C/C:L/I:L/A:N
Updated: 2026-11-02

OSVUBUNTU-CVE-2025-61638 0.0

Record: UBUNTU-CVE-2025-61638
CVSS 4.0: 0.0 NoneCVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:P/VC:N/VI:N/VA:N/SC:N/SI:N/SA:N/E:U
CVSS 3.1: 4.8 MediumCVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:C/C:L/I:L/A:N
Updated: 2026-11-02

OSVMGASA-2025-0260 No score

Updated mediawiki packages fix security vulnerabilities

i18n XSS vulnerability in HTMLMultiSelectField when sections are used. (CVE-2025-3469) "reupload-own" restriction can be bypassed by reverting file. (CVE-2025-32696) Cascading protection is not preventing file reversions. (CVE-2025-32697) LogPager.php: Restriction enforcer functions do not correctly enforce suppression restrictions. (CVE-2025-32698) Potential javascript injection attack enabled by Unicode normalization in Action API. (CVE-2025-32699) AbuseFilter log interfaces expose global private and hidden filters when central DB is not available. (CVE-2025-32700) HTML injection in feed output from i18n message. (CVE-2025-32072) OATHAuth extension: Reauthentication for enabling 2FA can be bypassed by submitting a form in Special:OATHManage. (CVE-2025-11173) Stored i18n Cross-site scripting (XSS) vulnerability in mw.language.listToText. (CVE-2025-11261) ConfirmEdit extension: Missing rate limiting in ApiFancyCaptchaReload. (CVE-2025-61635) Parsoid: Validation bypass for data- attributes. (CVE-2025-61638) Log entries which are hidden from the creation of the entry may be disclosed to the public recent change entry. (CVE-2025-61639) Stored i18n Cross-site scripting (XSS) vulnerability in Special:RecentChangesLinked. (CVE-2025-61640) DDoS vulnerability in QueryAllPages API in miser mode. The maxsize value is now ignored in that mode. (CVE-2025-61641) Suppressed recent changes may be disclosed to the public RCFeeds. (CVE-2025-61643) Public Watchlist/RecentChanges pages may disclose hidden usernames when an individual editor makes consecutive revisions on a single page, and only some are marked as hidden username. (CVE-2025-61646) TextExtracts extension: Information disclosure vulnerability in the extracts API action endpoint due to missing read permission check. (CVE-2025-61653) VisualEditor extension: Stored i18n Cross-site scripting (XSS) vulnerability in lastModifiedAt system messages. (CVE-2025-61655) VisualEditor extension: Missing attribute validation for attributes unwrapped from data-ve-attributes. (CVE-2025-61656)

Record: MGASA-2025-0260
Updated: 2026-11-02

Affected products

Affected packages

Affected packages
Package	Affected	Fixed
`mediawiki` Debian:12	before 1:1.39.17-1~deb12u1, plus listed versions 1:1.39.10-11:1.39.10-1~deb12u11:1.39.12-1~deb12u11:1.39.13-1~deb12u11:1.39.2-1 Show 9 moreShow less 1:1.39.4-11:1.39.4-1~deb12u11:1.39.4-21:1.39.5-11:1.39.5-1~deb12u11:1.39.6-11:1.39.7-11:1.39.7-1~deb12u11:1.39.8-1	1:1.39.17-1~deb12u1
`mediawiki` Debian:13	before 1:1.43.6+dfsg-1~deb13u1, plus listed versions 1:1.43.3+dfsg-11:1.43.5+dfsg-1	1:1.43.6+dfsg-1~deb13u1
`mediawiki` Debian:14	before 1:1.43.5+dfsg-1, plus listed versions 1:1.43.3+dfsg-1	1:1.43.5+dfsg-1
`mediawiki` Debian:11 From an advisory covering 12 CVEs	before 1:1.35.13-1+deb11u5, plus listed versions 1:1.35.11-1~deb11u11:1.35.13-1+deb11u21:1.35.13-1+deb11u31:1.35.13-1+deb11u41:1.35.13-1~deb11u1 Show 12 moreShow less 1:1.35.2-11:1.35.3-11:1.35.4-11:1.35.4-1+deb11u21:1.35.4-1~deb11u11:1.35.5-11:1.35.5-21:1.35.6-11:1.35.7-11:1.35.8-11:1.35.8-1.11:1.35.8-1~deb11u1	1:1.35.13-1+deb11u5
`mediawiki` Debian:12 From an advisory covering 19 CVEs	before 1:1.39.17-1~deb12u1, plus listed versions 1:1.39.10-11:1.39.10-1~deb12u11:1.39.12-1~deb12u11:1.39.13-1~deb12u11:1.39.2-1 Show 9 moreShow less 1:1.39.4-11:1.39.4-1~deb12u11:1.39.4-21:1.39.5-11:1.39.5-1~deb12u11:1.39.6-11:1.39.7-11:1.39.7-1~deb12u11:1.39.8-1	1:1.39.17-1~deb12u1
`mediawiki` Debian:13 From an advisory covering 19 CVEs	before 1:1.43.6+dfsg-1~deb13u1, plus listed versions 1:1.43.3+dfsg-11:1.43.5+dfsg-1	1:1.43.6+dfsg-1~deb13u1
`mediawiki` Mageia:9 From an advisory covering 18 CVEs	before 1.35.14-1.1.mga9	1.35.14-1.1.mga9
`mediawiki` Ubuntu:18.04:LTS	All versions, plus listed versions 1:1.27.3-11:1.27.4-11:1.27.4-21:1.27.4-3	None known
`mediawiki` Ubuntu:Pro:20.04:LTS	All versions, plus listed versions 1:1.31.2-1ubuntu11:1.31.5-11:1.31.5-1ubuntu11:1.31.5-21:1.31.5-3 Show 4 moreShow less 1:1.31.5-3ubuntu11:1.31.6-11:1.31.7-11:1.31.7-1ubuntu0.1~esm1	None known
`mediawiki` Ubuntu:Pro:22.04:LTS	All versions, plus listed versions 1:1.35.3-11:1.35.4-11:1.35.5-11:1.35.5-1ubuntu11:1.35.5-1ubuntu21:1.35.5-1ubuntu31:1.35.6-11:1.35.6-1ubuntu0.1~esm1	None known

Show 4 moreShow less

Affected packages
Package	Affected	Fixed
`mediawiki` Ubuntu:Pro:24.04:LTS	All versions, plus listed versions 1:1.39.4-21:1.39.5-11:1.39.6-11:1.39.7-11:1.39.7-1ubuntu0.1~esm1	None known
`mediawiki` Ubuntu:25.10	All versions, plus listed versions 1:1.43.1+dfsg-11:1.43.1+dfsg-21:1.43.3+dfsg-1	None known
`mediawiki` Ubuntu:26.10	All versions, plus listed versions 1:1.43.8+dfsg-21:1.43.9+dfsg-11:1.43.9+dfsg-1ubuntu1	None known
`mediawiki` Ubuntu:26.04:LTS	All versions, plus listed versions 1:1.43.3+dfsg-11:1.43.5+dfsg-11:1.43.6+dfsg-21:1.43.8+dfsg-11:1.43.8+dfsg-2	None known

Public exploits

Links only. Every CVE stores no exploit code.

Public exploits
Source	Link	Date
PoC in GitHub	gui-ying233/CVE-2025-61638	2025-11-28

History

History
Recorded	Changed	Sources
Nov 6, 2026	affected, facts
Nov 2, 2026	first indexed	CVE List, EUVD, GitHub Advisories, NVD, OSV, PoC in GitHub

Dates are when Every CVE recorded each change. Upstream dates may differ.

In short

CVE-2025-61638 is a none vulnerability (CVSS 0.0) in Mediawiki, published October 31, 2025. Public exploit code exists. EPSS puts the chance of exploitation in the next 30 days at 0.27%, the 19th percentile. Fixed in mediawiki 1:1.39.17-1~deb12u1.

References

Show 8 moreShow less