CVE-2021-39175
mediumpriority · track · 24EPSS 0.006 · 49 %ileEUUSEPSS · scored 2026-10-27
HedgeDoc is a platform to write and share markdown. In versions prior to 1.9.0, an unauthenticated attacker can inject arbitrary JavaScript into the speaker-notes of the slide-mode feature by embedding an iframe hosting the malicious code into the slides or by embedding the HedgeDoc instance into another page. The problem is patched in version 1.9.0. There are no known workarounds aside from upgrading.
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 · 4.3–8.1
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
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references (13)
External citations — patches, advisories, analysis.
- https://github.com/hedgedoc/hedgedoc/pull/1369cnnvd
- https://github.com/hedgedoc/hedgedoc/pull/1375cnnvd
- https://github.com/hedgedoc/hedgedoc/pull/1513cnnvd
- https://github.com/hedgedoc/hedgedoc/security/advisories/GHSA-j748-779h-9697cnnvd
- https://www.cybersecurity-help.cz/vdb/SB2021091406cnnvd
- https://github.com/hedgedoc/hedgedoc/pull/1369enisa_euvd
- https://github.com/hedgedoc/hedgedoc/pull/1375enisa_euvd
- https://github.com/hedgedoc/hedgedoc/pull/1513enisa_euvd
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