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Leantime allows Stored Cross-Site Scripting (XSS)GHSA-63cr-xg3f-8jvr

GHSA-63cr-xg3f-8jvr is a security vulnerability in leantime/leantime. The records list no fixed version yet; check the vendor advisory below and apply the mitigations in the meantime.

Published
Updated
Affected
1 pkg
Patched
None yet
Exploits
None indexed
Exploitation data as of Feb 21, 2025 · OSV.dev, FIRST.org (EPSS)

Real-World Exposure

1 pkg affected
🐘leantime/leantime

Real-time download stats are indexed for npm and PyPI packages. This vulnerability affects Packagist packages — download data is not available via public APIs for these ecosystems.

Description

Summary

Stored XSS, also known as persistent XSS, is the more damaging of the two. It occurs when a malicious script is injected directly into a vulnerable web application.

Details

A Stored Cross-Site Scripting (XSS) vulnerability was found that could potentially compromise user data and pose a significant security risk to the platform.

PoC

  • Create a project
  • Navigate to project
  • Visit to the integration
  • Add malicious payload inside the webhook and save it.
  • Notice the alert dialogue indicating successful execution of the XSS payload.
'';!--" onfocus=alert(0) autofocus=""  onload=alert(3);="&{(alert(1))}" |="" mufazmi"="

'';!--" onfocus=alert(0) autofocus=""  onload=alert(3);=>>"&{(alert(1))}" |="">> mufazmi"=">>

POC

https://youtu.be/kqKFgsOqstg

Impact

This XSS vulnerability allows an attacker to execute malicious scripts in the context of a victim's browser when they click on a specially crafted link. This could lead to various malicious activities, including session hijacking, stealing sensitive information such as cookies or login credentials, and potentially compromising the entire platform's security.

Affected Packages

1 total
EcosystemPackageVulnerable rangeFix
🐘Packagistleantime/leantimeall versionsNo fix

Detection & mitigation playbook

Open-source dependency

  1. Detect

    Scan your dependency tree (package-lock.json, pnpm-lock.yaml, requirements.txt, go.sum, etc.) for leantime/leantime, including transitive dependencies — a direct dependency you never call can still pull in a vulnerable version.

  2. Remediation status

    The records we use list no patched version of leantime/leantime for GHSA-63cr-xg3f-8jvr. Check the maintainer's advisory, and where your build allows, override or pin the dependency away from the vulnerable range.

  3. Mitigate without a patch

    Escape or sanitise the affected output on the server side rather than relying on client-side filtering, and add a Content-Security-Policy that blocks inline script execution so injected markup cannot run even if it reaches the page.

Frequently Asked Questions

### Summary Stored XSS, also known as persistent XSS, is the more damaging of the two. It occurs when a malicious script is injected directly into a vulnerable web application. ### Details A Stored Cross-Site Scripting (XSS) vulnerability was found that could potentially compromise user data and pose a significant security risk to the platform. ### PoC - Create a project - Navigate to project - Visit to the integration - Add malicious payload inside the webhook and save it. - Notice the alert dialogue indicating successful execution of the XSS payload. ``` '';!--" onfocus=alert(0) autofocu
O3 Security · Impact-Aware SCA

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Leantime allows Stored Cross-Site Scripting (XSS)