HedgeDoc is open source software which lets you create real-time collaborative markdown notes. In HedgeDoc before version 1.7.2, an attacker can inject arbitrary JavaScript into a HedgeDoc note, which is executed when the note is viewed in slide mode. Depending on the configuration of the instance, the attacker may not need authentication to create or edit notes. The problem is patched in HedgeDoc 1.7.2. As a workaround, disallow loading JavaScript from 3rd party sites using the `Content-Security-Policy` header. Note that this will break some embedded content.
History

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cve-icon MITRE Information

Status: PUBLISHED

Assigner: GitHub_M

Published: 2021-01-22T17:10:19

Updated: 2021-06-04T15:46:03

Reserved: 2020-12-22T00:00:00


Link: CVE-2021-21259

JSON object: View

cve-icon NVD Information

Status : Analyzed

Published: 2021-01-22T17:15:12.867

Modified: 2021-06-08T14:36:18.190


Link: CVE-2021-21259

JSON object: View

cve-icon Redhat Information

No data.

CWE