{"id":"CVE-2026-85271","title":"Open edX Platform enables the authoring and delivery of online learning at any scale","summary":"Open edX Platform enables the authoring and delivery of online learning at any scale. From Redwood until Ulmo and Verawood.1, the add_additional_attributes_to_notifications function in openedx/core/djangoapps/notifications/email/utils.py…","severity":"medium","cvss":6.1,"cvssVector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N","cwe":["CWE-79"],"vendor":"openedx","product":"openedx-platform","affected":["openedx-platform >= release/redwood.1, < release/ulmo.4"],"published":"2026-09-18","updated":"2026-09-22","sourceUpdated":"2026-09-22T16:18:04.273","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-85271","references":[{"url":"https://github.com/openedx/openedx-platform/commit/2af03d21b4142e53e375c7f3699b313e92ec5121","label":"security-advisories@github.com"},{"url":"https://github.com/openedx/openedx-platform/commit/52f2b3bb3e6fac2601c29e8f926c81498d20bb0b","label":"security-advisories@github.com"},{"url":"https://github.com/openedx/openedx-platform/commit/5eae6e51a8797cd3b87cc132f5de73d52561c4d7","label":"security-advisories@github.com"},{"url":"https://github.com/openedx/openedx-platform/releases/tag/release/ulmo.4","label":"security-advisories@github.com"},{"url":"https://github.com/openedx/openedx-platform/releases/tag/release/verawood.1","label":"security-advisories@github.com"},{"url":"https://github.com/openedx/openedx-platform/security/advisories/GHSA-rv5w-f4r5-h77g","label":"security-advisories@github.com"}],"tags":["nvd","cve.org"],"ssvc":{"exploitation":"none","automatable":"no","technicalImpact":"partial","timestamp":"2026-09-22T15:51:53.192423Z"},"epss":0.00201,"epssPercentile":0.10228,"ingestedAt":"2026-09-18T20:51:25.783Z","slug":"CVE-2026-85271","body":"## Overview\n\nOpen edX Platform enables the authoring and delivery of online learning at any scale. From Redwood until Ulmo and Verawood.1, the add_additional_attributes_to_notifications function in openedx/core/djangoapps/notifications/email/utils.py assigns notification content without sanitizing discussion-title values produced by get_notification_content in openedx/core/djangoapps/notifications/base_notification.py. An enrolled student can place CSS-capable markup in the post_title value supplied by lms/djangoapps/discussion/rest_api/discussions_notifications.py. Digest and batched-email rendering then passes that value through openedx/core/djangoapps/notifications/templates/notifications/digest_content.html as safe HTML, allowing email-open tracking and content spoofing or phishing when another learner opens a CSS-rendering client. The immediate-email path is not affected because it strips title markup and renders a separately sanitized body. This issue is fixed in Ulmo and Verawood.1.\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"sunlit","depthScore":34,"depthScoreParts":{"impact":33.6,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[]}