CVE-2020-26286
mediumpriority · track · 31EPSS 0.014 · 73 %ileEUUSEPSS · scored 2026-10-27
HedgeDoc is a collaborative platform for writing and sharing markdown. In HedgeDoc before version 1.7.1 an unauthenticated attacker can upload arbitrary files to the upload storage backend including HTML, JS and PHP files. The problem is patched in HedgeDoc 1.7.1. You should however verify that your uploaded file storage only contains files that are allowed, as uploaded files might still be served. As workaround it's possible to block the `/uploadimage` endpoint on your instance using your reverse proxy. And/or restrict MIME-types and file names served from your upload file storage.
cvss
Technical severity, 0–10. One row per scoring source.
base score 0–10 · higher = more severe · hover a vector to decode⚠ sources disagree · medium–high · 5–7.5
weaknesses
The CWE weakness classes this flaw belongs to.
affected products (2)
Products and version ranges known to be affected.
also known as (2)
Other names and identifiers for this entity.
sources
Which sources assert this record, and when.
references (10)
External citations — patches, advisories, analysis.
- https://github.com/hedgedoc/hedgedoc/commit/e9306991cdb5ff2752c1eeba3fedba42aec3c2d8cnnvd
- https://github.com/hedgedoc/hedgedoc/releases/tag/1.7.1cnnvd
- https://github.com/hedgedoc/hedgedoc/security/advisories/GHSA-wcr3-xhv7-8gxccnnvd
- https://nvd.nist.gov/vuln/detail/CVE-2020-26286cnnvd
- https://github.com/hedgedoc/hedgedoc/commit/e9306991cdb5ff2752c1eeba3fedba42aec3c2d8enisa_euvd
- https://github.com/hedgedoc/hedgedoc/releases/tag/1.7.1enisa_euvd
- https://github.com/hedgedoc/hedgedoc/security/advisories/GHSA-wcr3-xhv7-8gxcenisa_euvd
- https://github.com/hedgedoc/hedgedoc/commit/e9306991cdb5ff2752c1eeba3fedba42aec3c2d8PatchThird Party Advisorynvd
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