What’s Vulnerable › Vulnerabilities

CVE-2022-24837: Enumerable upload file names in hedgedoc

• Severity: medium (CVSS 5.3 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 1.1% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2022-04-11 · updated 2026-06-17
• Weakness: CWE-200

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.

Affected products

• hedgedoc: from 1.9.1 before 1.9.3 — fixed in 1.9.3

How to fix

Upgrade to a fixed version: hedgedoc 1.9.3. Check the vendor advisory for mitigations.

References

• https://github.com/hedgedoc/hedgedoc/commit/9e2f9e21e904c4a319e84265da7ef03b0a8e343a
• https://github.com/hedgedoc/hedgedoc/security/advisories/GHSA-q6vv-2q26-j7rx
• https://github.com/node-formidable/formidable/issues/808
• https://github.com/hedgedoc/hedgedoc/commit/9e2f9e21e904c4a319e84265da7ef03b0a8e343a
• https://github.com/hedgedoc/hedgedoc/security/advisories/GHSA-q6vv-2q26-j7rx
• https://github.com/node-formidable/formidable/issues/808

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