CVE-2016-6335

MediaWiki before 1.23.15, 1.26.x before 1.26.4, and 1.27.x before 1.27.1 does not generate head...

7.5 HighFix available

MediaWiki before 1.23.15, 1.26.x before 1.26.4, and 1.27.x before 1.27.1 does not generate head items in the context of a given title, which allows remote attackers to obtain sensitive information via a parse action to api.php.

Attack profile

How easy it is to exploit

Attack vector: Network
Complexity: Low
Privileges needed: None
User interaction: None

What an attacker can affect

Confidentiality: High
Integrity: None
Availability: None

Exploit likelihood

1.68%Up 0.5 points since Feb 4, 2022

What each source reports

NVD Score used 7.5

Record: CVE-2016-6335
CVSS 3.0: 7.5 HighCVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
CVSS 2.0: 5.0 MediumAV:N/AC:L/Au:N/C:P/I:N/A:N
Weakness: CWE-200
Updated: 2026-11-02

CVE List No score

Record: CVE-2016-6335
Updated: 2026-11-02

EUVDEUVD-2016-7262 No score

Record: EUVD-2016-7262
Updated: 2026-11-03

GitHub AdvisoriesGHSA-3399-vjx8-7x5c 7.5

MediaWiki before 1.23.15, 1.26.x before 1.26.4, and 1.27.x before 1.27.1 does not generate head...

Record: GHSA-3399-vjx8-7x5c
CVSS 3.0: 7.5 HighCVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
Weakness: CWE-200
Updated: 2026-11-02

OSV 7.5

Record: CVE-2016-6335
CVSS 3.0: 7.5 HighCVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
Updated: 2026-11-02

OSVDEBIAN-CVE-2016-6335 7.5

Record: DEBIAN-CVE-2016-6335
CVSS 3.0: 7.5 HighCVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
Updated: 2026-11-02

OSVMGASA-2016-0305 No score

Updated mediawiki packages fix security vulnerability

Check read permission when loading page content in ApiParse (CVE-2016-6331)

Make blocks log users out if $wgBlockDisablesLogin is true (CVE-2016-6332)

Make $wgBlockDisablesLogin also restrict logged in permissions (CVE-2016-6332)

Require login to preview user CSS pages (CVE-2016-6333)

Escape '<' and ']]>' in inline <style> blocks (CVE-2016-6333)

XSS in unclosed internal links (CVE-2016-6334)

API: Generate head items in the context of the given title (CVE-2016-6335)

Do not allow undeleting a revision deleted file if it is the top file (CVE-2016-6336)

The mediawiki package has been updated to version 1.23.15, which contains the above fixes.

Record: MGASA-2016-0305
Updated: 2026-11-02

Affected products

mediawiki

Affected packages

Affected packages
Package	Affected	Fixed
`mediawiki` Debian:12	before 1:1.27.1-1	1:1.27.1-1
`mediawiki` Debian:13	before 1:1.27.1-1	1:1.27.1-1
`mediawiki` Debian:14	before 1:1.27.1-1	1:1.27.1-1
`mediawiki` Mageia:5	before 1.23.15-1.mga5	1.23.15-1.mga5

History

History
Recorded	Changed	Sources
Nov 3, 2026	aliases	EUVD
Nov 2, 2026	first indexed	CVE List, GitHub Advisories, NVD, OSV

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

In short

CVE-2016-6335 is a high vulnerability (CVSS 7.5) in Mediawiki, published September 16, 2016. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 1.68%, the 77th percentile. Fixed in mediawiki 1:1.27.1-1.