# CVE-2026-39375: Frappe Learning Management System stored XSS in course meta tags

Source: https://junglewise.ai/threats/cve-2026-39375-frappe-learning-management-system-lms-is-a-learning-system-that  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2026-10-30. Updated: 2026-10-30  
License: CC BY 4.0 with a link back

CVE-2026-39375 · Severity: info · Published 2026-10-30

Frappe LMS is a web-based learning platform that allows organizations to structure and deliver educational content. An authenticated user with course editing permissions can inject malicious JavaScript code into course metadata fields, which gets stored and executed when other users view the course—allowing account takeover, credential theft, or session hijacking.

Technologies: [Frappe Learning Management System](https://junglewise.ai/threats/technologies/learning-management-system). Vendors: [Frappe](https://junglewise.ai/threats/vendors/frappe).

## Quick answers

**Is CVE-2026-39375 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-39375 being exploited in the wild.

**How severe is CVE-2026-39375?** Informational severity, published 30 October 2026.

**Which products and versions are affected?** Frappe Learning Management System prior to 2.52.0.

**Is there a fix for CVE-2026-39375?** Yes: fixed in 2.52.0. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.

**How is CVE-2026-39375 attacked?** It is attacked over the network, in a web application.

**Am I affected by CVE-2026-39375?** Check whether you run Frappe Learning Management System at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

## How to fix

- Fixed in 2.52.0

## Technical details

The vulnerability is a stored cross-site scripting (XSS) flaw in the Course Management module where meta tag field values are stored without HTML sanitization and rendered without proper escaping. An authenticated attacker with course editing privileges can inject arbitrary JavaScript through fields like title, image, description, and keywords. The fix applies output encoding (Jinja2 escape filter) to all meta tag attributes in the template.

## Affected products

- Frappe Learning Management System prior to 2.52.0

## Timeline

- 2026-10-30: disclosed

## References

- [https://github.com/frappe/lms/commit/cd6aca25f7d28425660720db4fdb920727edb670](https://github.com/frappe/lms/commit/cd6aca25f7d28425660720db4fdb920727edb670)
- [https://github.com/frappe/lms/commit/f244a6c9ff6e0b104fec48b2d97af4cc09896b60](https://github.com/frappe/lms/commit/f244a6c9ff6e0b104fec48b2d97af4cc09896b60)

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