Versio.io

CVE-2021-29503

Common vulnerabilities & exposures (CVE)

CVE databaseCVE database blogpostRelease & EoL database
 
Published at: - 19-05-2021 10:15
Last modified: - 25-04-2022 10:09
Total changes: - 3

Description

HedgeDoc is a platform to write and share markdown. HedgeDoc before version 1.8.2 is vulnerable to a cross-site scripting attack using the YAML-metadata of a note. An attacker with write access to a note can embed HTML tags in the Open Graph metadata section of the note, resulting in the frontend rendering the script tag as part of the `<head>` section. Unless your instance prevents guests from editing notes, this vulnerability allows unauthenticated attackers to inject JavaScript into notes that allow guest edits. If your instance prevents guests from editing notes, this vulnerability allows authenticated attackers to inject JavaScript into any note pages they have write-access to. This vulnerability is patched in version 1.8.2. As a workaround, one can disable guest edits until the next update.

Common Vulnerability Scoring System (CVSS)

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
Low
Attack complexity
Network
Attack vector
None
Availability
Low
Confidentiality
Low
Integrity
None
Privileges required
Changed
Scope
Required
User interaction
6.1
Base score
2.8
2.7
Exploitability score
Impact score
 

Verification logic

OR
vendor=hedgedoc AND product=hedgedoc AND versionEndExcluding=1.8.2
 

Reference

 


Keywords

NVD

 

CVE-2021-29503

 

CVE

 

Common vulnerabilities & exposures

 

CVSS

 

Common vulnerability scoring system

 

Security

 

Vulnerabilities

 

Exposures

 

We use cookies to ensure that we give you the best experience on our website. Read privacy policies for more information.