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CVE-2026-77610— Semantic MediaWiki has a query debug output XSS (`DebugFormatter`)

Quick assessment

Affected
SemanticMediaWiki SemanticMediaWiki
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Semantic MediaWiki is a free, open-source extension to MediaWiki that lets users store and query data within the wiki's pages. Prior to version 7.2.0, query debug output ( , or the request parameter on ) is assembled by and emitted as raw HTML. Several of its

CVSS 6.1 · Medium
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I. Basic Information for CVE-2026-77610

Vulnerability Information

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Vulnerability Title
Semantic MediaWiki has a query debug output XSS (`DebugFormatter`)
Source: CVE Program / CVE List V5
Vulnerability Description
Semantic MediaWiki is a free, open-source extension to MediaWiki that lets users store and query data within the wiki's pages. Prior to version 7.2.0, query debug output (`format=debug`, or the `debug` request parameter on `Special:Ask`) is assembled by `SMW\Query\DebugFormatter` and emitted as raw HTML. Several of its sinks apply no output-context encoding, so attacker-controlled query input is reflected into the page without escaping. On `Special:Ask` the resulting string is concatenated into the page and sent through `OutputPage::addHTML`, never through the MediaWiki parser or Sanitizer. No special user right is required; an anonymous request suffices. This is a reflected XSS: the payload is taken from the request and echoed in the same response. Exploitation requires the query condition to target a text/blob-typed property (whose value is re-serialized verbatim); the predefined `_txt` properties (`Text`, etc.) that ship on every install satisfy this, so no attacker-created content is needed. Version 7.2.0 patches the issue.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
在Web页面生成时对输入的转义处理不恰当(跨站脚本)
Source: CVE Program / CVE List V5

Affected Products

Vendor Product Affected Versions CPE Subscribe
SemanticMediaWiki SemanticMediaWiki < 7.2.0 -

II. Public POCs for CVE-2026-77610

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III. Intelligence Information for CVE-2026-77610

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Other References for CVE-2026-77610 (2)

Same Patch Batch · SemanticMediaWiki · 2026-09-18 · 7 CVEs total

CVE-2025-61682 8.6 HIGH Semantic MediaWiki vulnerable to stored XSS through wikitext via improper use of non-reser
CVE-2026-77606 6.1 MEDIUM Semantic MediaWiki has reflected XSS in Special:Ask plain table headers
CVE-2026-77609 6.1 MEDIUM Semantic MediaWiki has an open redirect in Special:URIResolver
CVE-2026-77607 6.1 MEDIUM Semantic MediaWiki affected by Special:Ask table `sep` parameter reflected XSS
CVE-2026-77608 6.1 MEDIUM Semantic MediaWiki has reflected XSS in `Special:SearchByProperty` (`property` and `value`
CVE-2026-77616 6.1 MEDIUM Semantic MediaWiki affected by reflected XSS in `Special:Ask` via a forged cursor paginati

IV. Related Vulnerabilities

Same product: SemanticMediaWiki
Same vendor: SemanticMediaWiki
Same weakness: CWE-79

V. Comments for CVE-2026-77610

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