CVE-2020-35478: MediaWiki before 1.35.1 allows XSS via BlockLogFormatter.php. MediaWiki:blanknamespace potentially can be output as raw HTML with SCRIPT tags via…

PriorityP424medium6.1CVSS 3.1

AVNACLPRNUIRSCCLILAN

EPSS

1.35%

68.7th percentile

MediaWiki before 1.35.1 allows XSS via BlockLogFormatter.php. MediaWiki:blanknamespace potentially can be output as raw HTML with SCRIPT tags via LogFormatter::makePageLink(). This affects MediaWiki 1.33.0 and later.

Affected

7 ranges

Vendor	Product	Version range	Fixed in
debian	mediawiki	< mediawiki 1:1.35.1-1 (bookworm)	mediawiki 1:1.35.1-1 (bookworm)
fedoraproject	fedora	—	—
mediawiki	mediawiki	>= 0 < 1:1.35.1-1	1:1.35.1-1
mediawiki	mediawiki	>= 0 < 1:1.35.1-1	1:1.35.1-1
mediawiki	mediawiki	>= 0 < 1:1.35.1-1	1:1.35.1-1
mediawiki	mediawiki	>= 0 < 1:1.35.1-1	1:1.35.1-1
mediawiki	mediawiki	>= 1.33.0 < 1.35.1	1.35.1

CVSS provenance

nvdv3.16.1MEDIUMCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N

nvdv2.04.3MEDIUMAV:N/AC:M/Au:N/C:N/I:P/A:N

osv6.1MEDIUM

vendor_debian6.1MEDIUM

vendor_redhat6.1MEDIUM

Stop checking back — get the weekly exploitation signal.

Every Monday: what got weaponized or added to CISA KEV in the last seven days — each CVE cross-linked to its PoC, Nuclei template, and detection rule. Free, one email a week, unsubscribe in one click.