---
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: 0.10235
ingestedAt: '2026-09-18T20:51:25.783Z'
---

## Overview

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 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.

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.