CVE-2026-85271

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Source

https://cve.org/CVERecord?id=CVE-2026-85271

Import Source

https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-85271.json

JSON Data

https://api.osv.dev/v1/vulns/CVE-2026-85271

Aliases

GHSA-rv5w-f4r5-h77g

Published

2026-09-18T20:38:40Z

Modified

2026-09-20T11:47:29Z

Severity

6.1 (Medium) CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N CVSS Calculator

Summary

Open edX Platform: Stored CSS Injection in Email Digest Notifications via Unsanitized Thread Title (incomplete patch of CVE-2026-42857)

Details

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.

Database specific

{
    "cna_assigner":  "GitHub_M",
    "cwe_ids":  [
        "CWE-79"
    ],
    "osv_generated_from":  "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/85xxx/CVE-2026-85271.json"
}

References

Affected packages

Git / github.com/openedx/openedx-platform

Affected ranges

Type

GIT

Repo

https://github.com/openedx/openedx-platform

Events

Introduced

142bb24065fa23eeaf9806a560762aa00013f296

Fixed

2af03d21b4142e53e375c7f3699b313e92ec5121

Fixed

52f2b3bb3e6fac2601c29e8f926c81498d20bb0b

Fixed

5eae6e51a8797cd3b87cc132f5de73d52561c4d7

Database specific

Show details

{
    "extracted_events":  [
        {
            "introduced":  ">= release/redwood.1, < release/ulmo.4"
        },
        {
            "last_affected":  ">= release/redwood.1, < release/ulmo.4"
        }
    ],
    "source":  [
        "AFFECTED_FIELD",
        "REFERENCES"
    ]
}

Affected versions

>= release/redwood.*

>= release/redwood.1, < release/ulmo.4

Database specific

source

"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-85271.json"