Vulnerability · Published Sep 12, 2024 · Assigned by GitHub_M

CVE-2024-45303Discourse Calendar plugin event names susceptible to XSS

Medium 6.1

In plain English

A medium-severity cross-site scripting in discourse-calendar from discourse. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.3% (higher than 17% of all known vulnerabilities).

Severity (CVSS 3.1)6.1Medium

Exploit odds (30 days)0.3%top 82.7% of all CVEs

Exploited in the wildNo reportsCISA SSVC: none

Attack toolingNoneno public tooling known

Official description

Discourse Calendar plugin adds the ability to create a dynamic calendar in the first post of a topic to Discourse. Rendering event names can be susceptible to XSS attacks. This vulnerability only affects sites which have modified or disabled Discourse’s default Content Security Policy. The issue is patched in version 0.5 of the Discourse Calendar plugin.

Affected products (as reported)

Vendor	Product	Versions
discourse	discourse-calendar	< 0.5

Weakness: CWE-79 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N

References

https://github.com/discourse/discourse-calendar/security/advisories/GHSA-rq37-8pf3-4xc8 x_refsource_CONFIRM
https://github.com/discourse/discourse-calendar/commit/81e1c8e3c4c02276fb890da7e3f684259aeb685c x_refsource_MISC