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CVE-2026-40927

Docmost: XSS in Comments with JavaScript URI

MEDIUM
5.4
CVSS Score
Published: April 21, 2026 at 08:52 PM UTC
Updated: June 17, 2026 at 10:45 AM UTC
1 product affected across 1 vendorDocmost

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Severity
MEDIUM5.4
Exploit prediction
EPSS 0.1%
SSVC
No known exploit

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

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

Docmost· Docmost
95%
v < 0.80.0
Affected range stops below 0.80.0, so it looks safe — our inference, not a vendor statement

Remediation

No guide yet

No remediation guidance has been written for this CVE yet. What the record does show:

Patch and advisory references

References (1)

x_refsource_CONFIRMVendor Advisory
Source: cverecord
https://github.com/docmost/docmost/security/advisories/GHSA-4gv6-jw3v-wc34

SSVC — Action Prioritization

SSVCNo known exploitNot automatablePartial impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

5.4MEDIUMGitHub_M
Attack Vector
NETWORK
Complexity
LOW
Privileges
LOW
User Interaction
REQUIRED
Scope
CHANGED
Confidentiality
LOW
Integrity
LOW
Availability
NONE
Vector?

Quick Info

StatusANALYZED
CWE
CWE-79

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