# CVE-2026-102982: Plane stored XSS in comments and intake descriptions

Source: https://junglewise.ai/threats/cve-2026-102982-plane-is-an-open-source-project-management-tool-prior-to-1-4-0  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2026-10-13. Updated: 2026-10-16  
License: CC BY 4.0 with a link back

CVE-2026-102982 · Severity: info · Published 2026-10-13

Plane is an open-source project management tool where comments and issue descriptions can store rich HTML. Prior to version 1.4.0, these fields did not properly sanitize user input, allowing a project member to inject malicious JavaScript that executes in other users' browsers when they view the comment or description.

Technologies: [Plane](https://junglewise.ai/threats/technologies/plane-plane). Vendors: [Plane](https://junglewise.ai/threats/vendors/plane).

## Quick answers

**Is CVE-2026-102982 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-102982 being exploited in the wild.

**How severe is CVE-2026-102982?** Informational severity, published 13 October 2026.

**Which products and versions are affected?** Plane before 1.4.0.

**Is there a fix for CVE-2026-102982?** Yes: fixed in 1.4.0. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.

**How is CVE-2026-102982 attacked?** It is attacked over the network, in a web application.

**Am I affected by CVE-2026-102982?** Check whether you run Plane 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 1.4.0

## Technical details

Stored XSS vulnerability in IssueCommentSerializer (both app and API layers) and intake description endpoints. The comment_html and description_html fields were either not validated or only underwent structural normalization without XSS payload removal. An authenticated project member can craft and submit a comment or intake issue with JavaScript payloads (e.g., script tags or javascript: URIs) that persist and execute in victims' browser contexts. Fixed in version 1.4.0 by adding validate_html_content() sanitization using the nh3 HTML sanitizer.

## Affected products

- Plane Plane before 1.4.0

## Timeline

- 2026-10-13: disclosed

## References

- [https://github.com/makeplane/plane/commit/0d58adb69d859fc94c43b9d68fadd77e810d5ed1](https://github.com/makeplane/plane/commit/0d58adb69d859fc94c43b9d68fadd77e810d5ed1)
- [https://github.com/makeplane/plane/pull/9287](https://github.com/makeplane/plane/pull/9287)

## Related threats

- [Plane project management missing authorization checks](https://junglewise.ai/threats/cve-2026-102985-plane-is-an-open-source-project-management-tool-in-1-3-1-and)
- [Plane order_by injection in issue-listing endpoints](https://junglewise.ai/threats/cve-2026-102988-plane-is-an-open-source-project-management-tool-prior-to-1-4-0)
- [Plane workspace invitation token disclosure and hijack](https://junglewise.ai/threats/cve-2026-102981-plane-is-an-open-source-project-management-tool-prior-to-1-4-0)
- [Plane hardcoded Django SECRET_KEY in community deployments](https://junglewise.ai/threats/cve-2026-105641-plane-is-an-open-source-project-management-tool-prior-to-1-4-0)
- [Plane workspace invitation hijacking and token disclosure](https://junglewise.ai/threats/cve-2026-105639-plane-is-an-open-source-project-management-tool-prior-to-1-4-0)