CVE-2012-4382

MediaWiki before 1.18.5, and 1.19.x before 1.19.2 does not properly protect user block metadata,...

4.9 MediumFix available

CVE-2012-4382 is a medium vulnerability (CVSS 4.9) in Mediawiki, published October 19, 2017. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 1.20%, the 68th percentile. Fixed in mediawiki 1:1.19.2-1.

What does this mean?

Severity: 4.9 MediumCVSS 3.0, NVD
Exploit chance: 1.20%EPSS, 68th percentile
Exploitation: None knownNot on CISA’s or ENISA’s lists
Fixed in: 1:1.19.2-1mediawiki +2 more

Description

MediaWiki before 1.18.5, and 1.19.x before 1.19.2 does not properly protect user block metadata, which allows remote administrators to read a user block reason via a reblock attempt.

Attack profile

How easy it is to exploit

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

What an attacker can affect

Confidentiality: High
Integrity: None
Availability: None

Exploit likelihood

1.20%Up 0.3 points since Feb 4, 2022

Affected products

mediawiki

Affected packages

Affected packages
Package	Affected	Fixed
`mediawiki` Debian:12	before 1:1.19.2-1	1:1.19.2-1
`mediawiki` Debian:13	before 1:1.19.2-1	1:1.19.2-1
`mediawiki` Debian:14	before 1:1.19.2-1	1:1.19.2-1

What each source reports

NVD Score used4.9

MediaWiki before 1.18.5, and 1.19.x before 1.19.2 does not properly protect user block metadata, which allows remote administrators to read a user block reason via a reblock attempt.

Record: CVE-2012-4382
CVSS 3.0: 4.9 MediumCVSS:3.0/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:N/A:N
CVSS 2.0: 4.0 MediumAV:N/AC:L/Au:S/C:P/I:N/A:N
Weakness: CWE-200
Updated: 2026-11-02

CVE ListNo score

MediaWiki before 1.18.5, and 1.19.x before 1.19.2 does not properly protect user block metadata, which allows remote administrators to read a user block reason via a reblock attempt.

Record: CVE-2012-4382
Updated: 2026-11-02

EUVDEUVD-2012-4325No score

MediaWiki before 1.18.5, and 1.19.x before 1.19.2 does not properly protect user block metadata, which allows remote administrators to read a user block reason via a reblock attempt.

Record: EUVD-2012-4325
Updated: 2026-11-03

GitHub AdvisoriesGHSA-qxg6-q47j-rhmf4.9

MediaWiki before 1.18.5, and 1.19.x before 1.19.2 does not properly protect user block metadata,...

MediaWiki before 1.18.5, and 1.19.x before 1.19.2 does not properly protect user block metadata, which allows remote administrators to read a user block reason via a reblock attempt.

Record: GHSA-qxg6-q47j-rhmf
CVSS 3.0: 4.9 MediumCVSS:3.0/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:N/A:N
Weakness: CWE-200
Updated: 2026-11-02

OSV4.9

MediaWiki before 1.18.5, and 1.19.x before 1.19.2 does not properly protect user block metadata, which allows remote administrators to read a user block reason via a reblock attempt.

Record: CVE-2012-4382
CVSS 3.0: 4.9 MediumCVSS:3.0/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:N/A:N
Updated: 2026-11-02

OSVDEBIAN-CVE-2012-43824.9

MediaWiki before 1.18.5, and 1.19.x before 1.19.2 does not properly protect user block metadata, which allows remote administrators to read a user block reason via a reblock attempt.

Record: DEBIAN-CVE-2012-4382
CVSS 3.0: 4.9 MediumCVSS:3.0/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:N/A:N
Updated: 2026-11-02

OSVUBUNTU-CVE-2012-43824.9

MediaWiki before 1.18.5, and 1.19.x before 1.19.2 does not properly protect user block metadata, which allows remote administrators to read a user block reason via a reblock attempt.

Record: UBUNTU-CVE-2012-4382
CVSS 3.0: 4.9 MediumCVSS:3.0/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:N/A:N
Updated: 2026-11-02

History

History
Recorded	Changed	Sources
Nov 10, 2026	facts
Nov 3, 2026	affected
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.

References

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