Machine-written summary
Summary written by Claude Haiku from the source advisory. Not reviewed by a person.
Semantic MediaWiki (Packagist package mediawiki/semantic-media-wiki) versions before 7.2.0 are affected by a reflected cross-site scripting flaw in the Special:Ask table output, where the `sep` parameter was inserted into the generated HTML without escaping. Because the same unsanitised output is produced for both the standard render and the raw request mode, an attacker could inject HTML through this value without needing an account. The fix is to upgrade to version 7.2.0, which escapes the separator except for safe line-break variants.
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 0.0028, the 21st 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