AEGLIX vulnerability intelligence
CVE-2026-42857
MEDIUM · CVSS 4.6 · Modified
Published: 2026-05-11 · Updated: 2026-10-26 · Source: NVD
Stored catalog record
Source record retrieved 2026-10-28T10:24:33.197720+00:00. Scheduled imports handle updates; this page does not assert that the provider was queried just now.
Vulnerability overview
Open edX Platform enables the authoring and delivery of online learning at any scale. The HTML sanitizer clean_thread_html_body() used for discussion notification emails fails to remove <style> tags from user-generated discussion post content. This content is rendered with Django's |safe template filter in email notification templates, allowing any enrolled student to inject arbitrary CSS into email notifications sent to other users. This enables email tracking (IP address disclosure), content spoofing, and phishing attacks. This vulnerability is fixed with commit cddc25cd791bb78f76833896e4778f668861df12.
Patch review priority
Assess exposure and vendor guidance
- No higher-priority signal is available in the current stored evidence.
FIRST EPSS: 0.18% · percentile 7.9 · score date 2026-10-27.
EPSS estimates probability of exploitation in the next 30 days. It does not measure your exposure or prove exploitation. The elevated threshold is 10%; CISA KEV takes precedence. About FIRST EPSS ↗
Severity and scoring
- CVSS score
- 4.6 · MEDIUM
- CVSS version
- 3.1
- CVSS vector
- CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:L/I:L/A:N
- Weaknesses
- CWE-79
CVSS measures technical severity; it does not establish whether this vulnerability is being exploited in your environment.
Known exploitation and remediation
Not listed in the CISA catalog retrieved for this record. This does not establish that exploitation has not occurred.
Verify affected versions and patch availability in the vendor advisory before making changes.
Affected products and versions
cpe:2.3:a:openedx:openedx:*:*:*:*:*:*:*:*
Before (exclusive): 2026-04-24
These are NVD CPE applicability entries. Some products depend on configuration conditions; consult the official record to confirm applicability.
Advisories and references
- https://github.com/openedx/openedx-platform/commit/cddc25cd791bb78f76833896e4778f668861df12
Patch
- https://github.com/openedx/openedx-platform/security/advisories/GHSA-4xv3-5j4x-q8g4
Exploit · Vendor Advisory
- https://github.com/openedx/openedx-platform/security/advisories/GHSA-4xv3-5j4x-q8g4
Exploit · Vendor Advisory