Description
HedgeDoc is an open-source, web-based, self-hosted, collaborative markdown editor. Images uploaded with HedgeDoc version 1.9.1 and later have an enumerable filename after the upload, resulting in potential information leakage of uploaded documents. This is especially relevant for private notes and affects all upload backends, except Lutim and imgur. This issue is patched in version 1.9.3 by replacing the filename generation with UUIDv4. If you cannot upgrade to HedgeDoc 1.9.3, it is possible to block POST requests to `/uploadimage`, which will disable future uploads.
References (3)
Core 3
Core References
Patch, Third Party Advisory x_refsource_confirm
https://github.com/hedgedoc/hedgedoc/security/advisories/GHSA-q6vv-2q26-j7rx
Issue Tracking, Third Party Advisory x_refsource_misc
https://github.com/node-formidable/formidable/issues/808
Patch, Third Party Advisory x_refsource_misc
https://github.com/hedgedoc/hedgedoc/commit/9e2f9e21e904c4a319e84265da7ef03b0a8e343a
Scores
CVSS v3
5.3
EPSS
0.0031
EPSS Percentile
54.5%
Attack Vector
NETWORK
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
CISA SSVC
Vulnrichment
Exploitation
none
Automatable
yes
Technical Impact
partial
Details
CWE
CWE-434
CWE-200
Status
published
Products (1)
hedgedoc/hedgedoc
1.9.1 - 1.9.3
Published
Apr 11, 2022
Tracked Since
Feb 18, 2026