{"id":"CVE-2021-32764","details":"Discourse is an open-source discussion platform. In Discourse versions 2.7.5 and prior, parsing and rendering of YouTube Oneboxes 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 `stable` version 2.7.6, `beta` version 2.8.0.beta3, and `tests-passed` version 2.8.0.beta3. As a workaround, 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.","aliases":["BIT-discourse-2021-32764"],"modified":"2026-04-12T03:27:03.702510Z","published":"2021-07-15T21:15:09.373Z","related":["GHSA-9x4c-29xg-56hw"],"references":[{"type":"ADVISORY","url":"https://github.com/discourse/discourse/security/advisories/GHSA-9x4c-29xg-56hw"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://github.com/discourse/discourse","events":[{"introduced":"0"},{"last_affected":"a94a62300971415ef8cdd63b639ee24f4f6daff3"},{"last_affected":"05c1d3c9cdd7f3e365bedc397dd92a7e7bc2c40f"}],"database_specific":{"extracted_events":[{"introduced":"0"},{"last_affected":"2.7.5"},{"last_affected":"2.8.0-beta1"}],"cpe":["cpe:2.3:a:discourse:discourse:*:*:*:*:*:*:*:*","cpe:2.3:a:discourse:discourse:2.8.0:beta1:*:*:*:*:*:*"],"source":"CPE_FIELD"}}],"versions":["v0.8.0","v0.8.1","v0.8.2","v0.8.3","v0.8.4","v0.8.5","v0.8.6","v0.8.7","v0.8.8","v0.8.9","v0.9.0","v0.9.1","v0.9.2","v0.9.2.5","v0.9.2.6","v0.9.3","v0.9.4","v0.9.5","v0.9.5.1","v0.9.5.2","v0.9.6","v0.9.6.1","v0.9.6.3","v0.9.6.4","v0.9.7","v0.9.7.1","v0.9.7.2","v0.9.7.3","v0.9.7.4","v0.9.7.5","v0.9.7.6","v0.9.7.7","v0.9.7.8","v0.9.7.9","v0.9.8","v0.9.8.1","v0.9.8.10","v0.9.8.11","v0.9.8.2","v0.9.8.3","v0.9.8.4","v0.9.8.5","v0.9.8.6","v0.9.8.7","v0.9.8.8","v0.9.8.9","v0.9.9.1","v0.9.9.10","v0.9.9.11","v0.9.9.12","v0.9.9.13","v0.9.9.14","v0.9.9.15","v0.9.9.16","v0.9.9.17","v0.9.9.18","v0.9.9.2","v0.9.9.3","v0.9.9.4","v0.9.9.5","v0.9.9.6","v0.9.9.7","v0.9.9.8","v0.9.9.9","v1.0.0","v1.0.1","v1.0.2","v1.0.3","v1.0.4","v1.1.0","v1.1.0.beta2","v1.1.0.beta3","v1.1.0.beta4","v1.1.0.beta5","v1.1.0.beta6","v1.1.0.beta6b","v1.1.0.beta7","v1.1.0.beta8","v1.1.1","v1.1.2","v1.1.3","v1.2.0","v1.2.0.beta1","v1.2.0.beta2","v1.2.0.beta3","v1.2.0.beta4","v1.2.0.beta5","v1.2.0.beta6","v1.2.0.beta7","v1.2.0.beta8","v1.2.0.beta9","v1.2.1","v1.2.2","v1.2.3","v1.2.4","v1.3.0","v1.3.0.beta1","v1.3.0.beta10","v1.3.0.beta11","v1.3.0.beta2","v1.3.0.beta3","v1.3.0.beta4","v1.3.0.beta5","v1.3.0.beta6","v1.3.0.beta9","v1.3.1","v1.3.2","v1.3.3","v1.3.4","v1.3.5","v1.4.0","v1.4.0.beta1","v1.4.0.beta10","v1.4.0.beta11","v1.4.0.beta12","v1.4.0.beta2","v1.4.0.beta3","v1.4.0.beta4","v1.4.0.beta5","v1.4.0.beta6","v1.4.0.beta7","v1.4.0.beta8","v1.4.0.beta9","v1.4.1","v1.4.2","v1.4.3","v1.4.4","v1.4.5","v1.4.6","v1.4.7","v1.5.0","v1.5.0.beta1","v1.5.0.beta10","v1.5.0.beta11","v1.5.0.beta12","v1.5.0.beta13","v1.5.0.beta13b","v1.5.0.beta14","v1.5.0.beta2","v1.5.0.beta4","v1.5.0.beta5","v1.5.0.beta6","v1.5.0.beta7","v1.5.0.beta8","v1.5.0.beta9","v1.5.1","v1.5.2","v1.5.3","v1.5.4","v1.6.0","v1.6.0.beta1","v1.6.0.beta10","v1.6.0.beta11","v1.6.0.beta12","v1.6.0.beta2","v1.6.0.beta3","v1.6.0.beta4","v1.6.0.beta5","v1.6.0.beta6","v1.6.0.beta7","v1.6.0.beta8","v1.6.0.beta9","v1.6.1","v1.6.10","v1.6.2","v1.6.3","v1.6.4","v1.6.5","v1.6.6","v1.6.7","v1.6.8","v1.6.9","v1.7.0","v1.7.0.beta1","v1.7.0.beta10","v1.7.0.beta11","v1.7.0.beta2","v1.7.0.beta3","v1.7.0.beta4","v1.7.0.beta5","v1.7.0.beta6","v1.7.0.beta7","v1.7.0.beta8","v1.7.0.beta9","v1.7.1","v1.7.10","v1.7.2","v1.7.3","v1.7.4","v1.7.5","v1.7.6","v1.7.7","v1.7.8","v1.7.9","v1.8.0","v1.8.0.beta1","v1.8.0.beta10","v1.8.0.beta11","v1.8.0.beta12","v1.8.0.beta13","v1.8.0.beta2","v1.8.0.beta3","v1.8.0.beta4","v1.8.0.beta5","v1.8.0.beta6","v1.8.0.beta7","v1.8.0.beta8","v1.8.0.beta9","v1.8.1","v1.8.10","v1.8.11","v1.8.2","v1.8.3","v1.8.4","v1.8.5","v1.8.6","v1.8.7","v1.8.8","v1.8.9","v1.9.0","v1.9.0.beta1","v1.9.0.beta10","v1.9.0.beta11","v1.9.0.beta12","v1.9.0.beta13","v1.9.0.beta14","v1.9.0.beta15","v1.9.0.beta16","v1.9.0.beta17","v1.9.0.beta2","v1.9.0.beta3","v1.9.0.beta4","v1.9.0.beta5","v1.9.0.beta6","v1.9.0.beta7","v1.9.0.beta8","v1.9.0.beta9","v1.9.1","v1.9.2","v1.9.3","v1.9.4","v1.9.5","v1.9.6","v1.9.7","v2.0.0","v2.0.0.beta1","v2.0.0.beta10","v2.0.0.beta2","v2.0.0.beta3","v2.0.0.beta4","v2.0.0.beta5","v2.0.0.beta6","v2.0.0.beta7","v2.0.0.beta8","v2.0.0.beta9","v2.0.1","v2.0.2","v2.0.3","v2.0.4","v2.0.5","v2.1.0","v2.1.0.beta1","v2.1.0.beta2","v2.1.0.beta3","v2.1.0.beta4","v2.1.0.beta5","v2.1.0.beta6","v2.1.1","v2.1.2","v2.1.3","v2.1.4","v2.1.5","v2.1.6","v2.1.7","v2.1.8","v2.2.0","v2.2.0.beta1","v2.2.0.beta10","v2.2.0.beta2","v2.2.0.beta3","v2.2.0.beta4","v2.2.0.beta5","v2.2.0.beta6","v2.2.0.beta7","v2.2.0.beta8","v2.2.0.beta9","v2.2.1","v2.2.2","v2.2.3","v2.2.4","v2.2.5","v2.2.6","v2.3.0","v2.3.0.beta1","v2.3.0.beta10","v2.3.0.beta11","v2.3.0.beta2","v2.3.0.beta3","v2.3.0.beta4","v2.3.0.beta5","v2.3.0.beta6","v2.3.0.beta7","v2.3.0.beta8","v2.3.0.beta9","v2.3.1","v2.3.10","v2.3.2","v2.3.3","v2.3.4","v2.3.5","v2.3.6","v2.3.7","v2.3.8","v2.3.9","v2.4.0","v2.4.0.beta1","v2.4.0.beta10","v2.4.0.beta11","v2.4.0.beta2","v2.4.0.beta3","v2.4.0.beta4","v2.4.0.beta5","v2.4.0.beta6","v2.4.0.beta7","v2.4.0.beta8","v2.4.0.beta9","v2.4.1","v2.4.2","v2.4.3","v2.4.4","v2.4.5","v2.5.0","v2.5.0.beta1","v2.5.0.beta2","v2.5.0.beta3","v2.5.0.beta4","v2.5.0.beta5","v2.5.0.beta6","v2.5.0.beta7","v2.5.1","v2.5.2","v2.5.3","v2.5.4","v2.5.5","v2.6.0","v2.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