An XSS issue was discovered in the SocialProfile extension in MediaWiki through 1.36.

published 2021-07-02 5 y ago modified 2026-06-17 4 mo ago also BIT-mediawiki-2021-36130 , EUVD-2021-22762

cvss: 4.8; version 3.1, NVD
cisa kev: Not listed; not in CISA's catalog
epss: 0.5%; EPSS 0.5% chance of exploitation in 30 days, percentile 46%
public exploits: 0; none known

An XSS issue was discovered in the SocialProfile extension in MediaWiki through 1.36. Within several gift-related special pages, a privileged user with the awardmanage right could inject arbitrary HTML and JavaScript within various gift-related data fields. The attack could easily propagate across many pages for many users.

Patch / fix

fixed in 1 links 2

bitnami mediawiki 1.36.1

phabricator.wikimedia.org/T281043 advisory
gerrit.wikimedia.org/r/q/Id915eba45497a1a0dc1c4e00818a2fd4c0ce55d3 advisory

Exploit prediction

0.55% chance of exploitation in the next 30 days, higher than 46% of all scored CVEs (FIRST EPSS, 2026-11-08).

Exploits and checks

phabricator.wikimedia.org https://phabricator.wikimedia.org/T281043 referenced PoC, tagged "exploit" by a source, unverified

CVSS scores

assigned by	version	score	vector
NVD	3.1	4.8	CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:C/C:L/I:L/A:N
NVD	2.0	3.5	AV:N/AC:M/Au:S/C:N/I:P/A:N
OSV	3.1	4.8	CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:C/C:L/I:L/A:N

Affected packages

ecosystem	package	affected	fixed in
bitnami	mediawiki	<1.36.1	1.36.1

Classification

Weakness

CWE-79 Improper Neutralization of Input During Web Page Generation

References

phabricator.wikimedia.org /T281043
exploit, patch, vendor-advisory, web
gerrit.wikimedia.org /r/q/Id915eba45497a1a0dc1c4e00818a2fd4c0ce55d3
patch, vendor-advisory, web
nvd.nist.gov /vuln/detail/CVE-2021-36130
web

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.

Summary