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TI-2026-81085 Aliases CVE-2026-116881GHSA-g72f-25hp-crjf

Cross-site scripting in Semantic MediaWiki property-value autocomplete

Priority MEDIUM 57CWE-79Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
Passive
Attack complexity
Low
Attack requirements
None
Impact type
Cross-site scripting
Confidentiality · integrity · availability
Low · Low · None
Fix status
Fixed

Attack profile from CVSS 4.0 · CNA. Fix status from CNA. Impact type from CWE-79.

Summary

Semantic MediaWiki from 3.0.0 before 7.3.1 contains a cross-site scripting flaw, tracked as CWE-79. Stored semantic property values are rendered unescaped in property-value autocomplete suggestions, so a malicious value can inject markup. When another user opens the autocomplete with an empty query, the value is inserted into the page as HTML, which can alter the dropdown and potentially execute script. An unauthenticated remote attacker must store the value beforehand and needs a user to open the autocomplete; a public proof-of-concept exploit is linked in the references.

Written with Claude Haiku 5.5 from the sources below · 2026-11-04

Description from the CNA

Semantic MediaWiki from 3.0.0 before 7.3.1 contains a cross-site scripting vulnerability that allows attackers to inject markup by storing malicious semantic property values rendered unescaped in autocomplete suggestions. When another user opens the property-value autocomplete with an empty query, jquery.autocomplete.js concatenates the raw PValueLookup API value into HTML via container.html(), altering the dropdown and potentially executing script.

Why it matters now

Exploitation Proof of concept CISA SSVC · not in CISA KEV
EPSS 0.0016 5th percentileScored 2026-11-07
Public exploit Yes 1 exploit referenceTagged by NVD
Fix Fixed SemanticMediaWiki (SemanticMediaWiki): 7.3.1

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
Poc
Automatable
No
Technical impact
Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
SemanticMediaWikiSemanticMediaWiki3.0.0 to before 7.3.17.3.1Patch availableCNA
  • SemanticMediaWiki VendorSemanticMediaWiki Affected 3.0.0 to before 7.3.1 Fixed in 7.3.1 Patch available CNA

CPE configurations NVD · 1

CPEVersionsRoleVendor
cpe:2.3:a:semantic-mediawiki:semantic_mediawiki:*:*:*:*:*:mediawiki:*:*3.0.0 to before 7.3.1VulnerableSemanticMediaWiki
  • cpe:2.3:a:semantic-mediawiki:semantic_mediawiki:*:*:*:*:*:mediawiki:*:* Versions 3.0.0 to before 7.3.1 Vulnerable ·SemanticMediaWiki

Remediation

Upgrade SemanticMediaWiki to version 7.3.1 or later, which fixes the flaw.

Written with Claude Haiku 5.5 from the sources below · 2026-11-04

  • Fix · CNA SemanticMediaWiki (SemanticMediaWiki) Fixed in 7.3.1

Fixed in the same release

Records fixed by the same vendor advisory or release, as the CNA lists them.

  • Release ·

    SemanticMediaWiki 7.3.1

    20 records Highest priority Priority HIGH 4 HIGH, 13 MEDIUM, 3 LOW

    Other records, highest priority first

    • TI-2026-81081 Resource exhaustion in Semantic MediaWiki via #set_recurring_eventPriority HIGH 77
    • TI-2026-81076 Semantic MediaWiki search lets attackers exhaust CPU via long termsPriority HIGH 77
    • TI-2026-81075 Uncontrolled recursion in Semantic MediaWiki via Special:AskPriority HIGH 77
    Show all 20 records →

Timeline

  1. 2026-10-27 Threatist record created from CVE-2026-116881
  2. 2026-10-27 Alias added: GHSA-g72f-25hp-crjf
  3. 2026-11-02 CISA SSVC decision points changed
  4. 2026-11-02 Priority changed: LOW → MEDIUM

References

Exploit 1

  • TI-2026-81081 Resource exhaustion in Semantic MediaWiki via #set_recurring_event CVSS 4.0HIGH 8.7
  • TI-2026-81076 Semantic MediaWiki search lets attackers exhaust CPU via long terms CVSS 4.0HIGH 8.7
  • TI-2026-81075 Uncontrolled recursion in Semantic MediaWiki via Special:Ask CVSS 4.0HIGH 8.7
  • TI-2026-81077 Missing authorization in Semantic MediaWiki smwtask API CVSS 4.0MEDIUM 6.9
  • TI-2026-81084 Cross-site request forgery in Semantic MediaWiki SMWAdmin page CVSS 4.0HIGH 7.1
  • TI-2026-81083 Missing authorization in Semantic MediaWiki smwtask update task CVSS 4.0MEDIUM 6.9
See all 22 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences