CVE-2021-39175

XSS vector in slide mode speaker-view

Description

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.

Categories

8.1
CVSS
Severity: High
CVSS 3.1 •
CVSS 2.0 •
EPSS 0.50%
Third-Party Advisory github.com Third-Party Advisory github.com Third-Party Advisory github.com Third-Party Advisory github.com
Affected: hedgedoc hedgedoc
Published at:
Updated at:

References

Link Tags
https://github.com/hedgedoc/hedgedoc/security/advisories/GHSA-j748-779h-9697 third party advisory patch
https://github.com/hedgedoc/hedgedoc/pull/1369 third party advisory patch
https://github.com/hedgedoc/hedgedoc/pull/1375 third party advisory patch
https://github.com/hedgedoc/hedgedoc/pull/1513 third party advisory patch

Frequently Asked Questions

What is the severity of CVE-2021-39175?
CVE-2021-39175 has been scored as a high severity vulnerability.
How to fix CVE-2021-39175?
To fix CVE-2021-39175, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2021-39175 being actively exploited in the wild?
As for now, there are no information to confirm that CVE-2021-39175 is being actively exploited. According to its EPSS score, there is a ~0% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
What software or system is affected by CVE-2021-39175?
CVE-2021-39175 affects hedgedoc hedgedoc.
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