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MitreCVE-2020-35479

HistoryDec 18, 2020 - 8:15 a.m.

CVE-2020-35479

2020-12-1808:15:15

CWE-79

mitre

web.nvd.nist.gov

cve-2020-35479

mediawiki

xss

blocklogformatter.php

nvd

security vulnerability

html escape

CVSS2

4.3

Attack Vector

NETWORK

Attack Complexity

MEDIUM

Authentication

NONE

Confidentiality Impact

NONE

Integrity Impact

PARTIAL

Availability Impact

NONE

AV:N/AC:M/Au:N/C:N/I:P/A:N

CVSS3

6.1

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

REQUIRED

Scope

CHANGED

Confidentiality Impact

LOW

Integrity Impact

LOW

Availability Impact

NONE

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N

AI Score

6.3

Confidence

High

EPSS

0.002

Percentile

59.2%

JSON

MediaWiki before 1.35.1 allows XSS via BlockLogFormatter.php. Language::translateBlockExpiry itself does not escape in all code paths. For example, the return of Language::userTimeAndDate is is always unsafe for HTML in a month value. This affects MediaWiki 1.12.0 and later.

Affected configurations

Nvd

Node

mediawikimediawikiRange1.12.0–1.35.1

Node

debiandebian_linuxMatch9.0

debiandebian_linuxMatch10.0

Node

fedoraprojectfedoraMatch33

VendorProductVersionCPE
mediawikimediawiki*cpe:2.3:a:mediawiki:mediawiki:*:*:*:*:*:*:*:*
debiandebian_linux9.0cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:*
debiandebian_linux10.0cpe:2.3:o:debian:debian_linux:10.0:*:*:*:*:*:*:*
fedoraprojectfedora33cpe:2.3:o:fedoraproject:fedora:33:*:*:*:*:*:*:*

Vendor	Product	Version	CPE
mediawiki	mediawiki	*	cpe:2.3:a:mediawiki:mediawiki::::::::
debian	debian_linux	9.0	cpe:2.3:o:debian:debian_linux:9.0:::::::*
debian	debian_linux	10.0	cpe:2.3:o:debian:debian_linux:10.0:::::::*
fedoraproject	fedora	33	cpe:2.3:o:fedoraproject:fedora:33:::::::*