Vulnerability · Published Apr 21, 2026 · Assigned by GitHub_M

CVE-2026-40927Docmost: XSS in Comments with JavaScript URI

Medium 5.4

In plain English

A medium-severity cross-site scripting in docmost from docmost. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.1% (higher than 3% of all known vulnerabilities).

Severity (CVSS 3.1)5.4Medium

Exploit odds (30 days)0.1%top 96.7% of all CVEs

Exploited in the wildNo reportsCISA SSVC: none

Attack toolingNoneno public tooling known

Official description

Docmost is open-source collaborative wiki and documentation software. Prior to 0.80.0, when leaving a comment on a page, it is possible to include a JavaScript URI as the link. When a user clicks on the link the JavaScript executes. This vulnerability is fixed in 0.80.0.

Affected products (as reported)

Vendor	Product	Versions
docmost	docmost	< 0.80.0

Weakness: CWE-79 · Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N

References

https://github.com/docmost/docmost/security/advisories/GHSA-4gv6-jw3v-wc34 x_refsource_CONFIRM