CVE-2026-34213: medium-severity vulnerability in docmost
Docmost has cross-page attachment overwrite via flawed attachmentId overwrite validation
Published · Updated
33Vexday Risk Score
No sign of exploitation. It has a public proof of concept.
ssvc Attendcvss 5.4epss 0.3%
from disclosure to weapon73 days
Published on NVDApr 14
1st PoC+73d
exploitation probability
0.3%top 80% of all CVEs
observed exploitation
nono source reports it
1 public exploit(s)
Docmost is open-source collaborative wiki and documentation software. Starting in version 0.3.0 and prior to version 0.71.0, improper authorization in Docmost allows a low-privileged authenticated user to overwrite another page's attachment within the same workspace by supplying a victim `attachmentId` to `POST /api/files/upload`. This is a remote integrity issue requiring no victim interaction. Version 0.71.0 contains a patch.
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:L
Affected products
docmost · docmostpublic PoCs found — 1
githubgithub.com/0xmrma/CVE-2026-34213★ 0⚠ Public resources, to assess the exposure of systems you control or are authorized to test. Test only with authorization.
Related CVEs — docmost
In the same product, most dangerous first.
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