Medium severity · published Oct 27, 2026
CVE-2026-116874
SemanticMediaWiki 3.1.0 before 7.3.1 Reflected XSS via JsonResultPrinter Default Parameter
New
6.1
CVSS
0.2%
EPSS
No
On KEV
Description
SemanticMediaWiki from 3.1.0 before 7.3.1 contains a reflected cross-site scripting vulnerability that allows unauthenticated attackers to inject scripts through the unescaped default parameter in JsonResultPrinter. Attackers can lure victims to a crafted Special:Ask link with a zero-result query and request_type=special_page, executing JavaScript in the wiki origin to steal sessions or CSRF tokens.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
Required
Confidentiality
Low
Integrity
Low
Availability
None
Scope
Changed
Exploitation
Is it being used?
Exploit prediction (EPSS)0.2% · higher than 6% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
SE
SemanticMediaWiki · SemanticMediaWiki
3.1.0 before 7.3.1 · source: vendor
SM
Semantic Mediawiki · Semantic-mediawiki
3.1.0 before 7.3.1 · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-116874
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-116874
github.com
https://github.com/SemanticMediaWiki/SemanticMediaWiki/security/advisories/GHSA-574v-j8hf-88h3
www.vulncheck.com
https://www.vulncheck.com/advisories/semanticmediawiki-3.1.0-before-7.3.1-reflected-xss-via-jsonresultprinter-default-parameter
More from SemanticMediaWiki
8.6
CVE-2025-61682
Semantic MediaWiki vulnerable to stored XSS through wikitext via improper use of non-reserved data attributes
7.5
CVE-2026-116878
Semantic MediaWiki 2.5.0 before 7.3.1 Resource Exhaustion via Special:PropertyLabelSimilarity
7.5
CVE-2026-116872
Semantic MediaWiki 3.0.0 before 7.3.1 Denial of Service via Special:Search Compact Filters
7.5
CVE-2026-116871
Semantic MediaWiki 3.0.0 before 7.3.1 Uncontrolled Recursion via Special:Ask
7.3
CVE-2026-116890
Semantic MediaWiki 3.0.0 before 7.3.0 Missing Authorization via smwtask API