Machine-written summary
Summary written by Claude Haiku from the source advisory. Not reviewed by a person.
Semantic MediaWiki, the Packagist package mediawiki/semantic-media-wiki, is vulnerable in versions before 7.2.0. When the Special:Ask table is rendered with plain headers, user-controlled mainlabel text is written into table header cells without escaping, so it can become executable HTML. The source does not state what access an attacker needs beyond being able to supply that label value. Upgrade to version 7.2.0, which applies output escaping to plain headers.
Not analysed yet
We haven’t published our analysis of this Advisory yet. Once a person has reviewed it, this page will say what’s vulnerable, what has to be true for your app to be affected, and how to check.
Severity and exploitation
| Score | Rating | CVSS | Vector | Source |
|---|---|---|---|---|
| 6.1 | Medium | 3.1 | CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N | CNA (GitHub_M) |
- CISA KEV Not listed.
- EPSS 0.0026, the 18th percentile, on 14 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days.
Timeline
- 31 Oct 2026, 13:55 UTC First seen by agentprime
- 31 Oct 2026, 13:55 UTC Confirmed by OSV