Description
Discourse is an open-source discussion platform. Prior to 2026.1.6, 2026.5.2, 2026.6.1, and 2026.7.0, the discourse-local-dates plugin rendered crafted local-date format data as HTML on sites with a modified or disabled default Content Security Policy. This issue is fixed in versions 2026.1.6, 2026.5.2, 2026.6.1, and 2026.7.0.
References5
- github.com/discourse/discourse/commit/9768f476ed86ea202440cd2b6…
- github.com/discourse/discourse/commit/981ba23d33d2e2d98f6690734…
- github.com/discourse/discourse/commit/a7e509bfa1aa6288b447503de…
- github.com/discourse/discourse/commit/d5d5055fbdf04d5bd72fcaa7e…
- github.com/discourse/discourse/security/advisories/GHSA-rw96-2x…
Metrics
- CVSS 4.0
-
2.0
LOW
Score source: CNA
CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:A/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X - EPSS — exploit probability
- 0% percentile: 42 · as of 12 November 2026
- CWE
- CWE-79
Could this be exploited in your environment?
A patch closes the known hole. A penetration test shows what an attacker can still reach — with proof.