CVE-2021-37633

XSS via d-popover and d-html-popover attribute

Description

Discourse is an open source discussion platform. In versions prior to 2.7.8 rendering of d-popover tooltips can be susceptible to XSS attacks. This vulnerability only affects sites which have modified or disabled Discourse's default Content Security Policy. This issue is patched in the latest `stable` 2.7.8 version of Discourse. As a workaround users may ensure that the Content Security Policy is enabled, and has not been modified in a way which would make it more vulnerable to XSS attacks.

Category

7.4
CVSS
Severity: High
CVSS 3.1 •
CVSS 2.0 •
EPSS 0.27%
Third-Party Advisory github.com Third-Party Advisory github.com
Affected: discourse discourse
Published at:
Updated at:

References

Link Tags
https://github.com/discourse/discourse/security/advisories/GHSA-v3v8-3m5w-pjp9 third party advisory
https://github.com/discourse/discourse/commit/38199424bc840d2ef002cd1e9bffdbb99191eb47 third party advisory patch

Frequently Asked Questions

What is the severity of CVE-2021-37633?
CVE-2021-37633 has been scored as a high severity vulnerability.
How to fix CVE-2021-37633?
To fix CVE-2021-37633, 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-2021-37633 being actively exploited in the wild?
As for now, there are no information to confirm that CVE-2021-37633 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-2021-37633?
CVE-2021-37633 affects discourse discourse.
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