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Medium, CVSS 5.9

Leantime allows Stored Cross-Site Scripting (XSS)

GHSA-63cr-xg3f-8jvr

What to do

Vendor response not established. Follow the primary source's mitigation guidance and check back for a fix.

This page has no inventory attached, so it cannot say whether you are affected. A vendor fix is not proof that your deployment is fixed.

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Affected packages

  • Packagist leantime/leantime

    Affected
    <= 3.1.4
    Fixed in
    no fixed version recorded

Sources

Severity and exploitation
Exploitation
No confirmed exploitation recorded. Patch Next marks exploitation only from CISA KEV.
CVSS 4.0
5.9 · CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:P/VC:L/VI:H/VA:N/SC:N/SI:N/SA:N · score source
EPSS
No dated EPSS signal available.
Source description

As published by the source; long descriptions are shortened.

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. 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.

Dates and revisions
Published by the source
Last modified by the source
Source last checked
  1. Revision 1 · created ·

    Published from ghsa record GHSA-63cr-xg3f-8jvr

Agent brief

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# Patch Next advisory brief: GHSA-63cr-xg3f-8jvr

Advisory: Leantime allows Stored Cross-Site Scripting (XSS)
IDs: GHSA-63cr-xg3f-8jvr
Record: https://patchnext.com/advisories/ghsa-63cr-xg3f-8jvr (revision 1, source checked 26 Oct 2026, 14:29 UTC)
Inventory: none attached. This brief comes from a public page and does not say whether any deployment is affected.
Severity: Medium (CVSS 5.9)
Exploitation: no confirmed exploitation recorded. Patch Next confirms exploitation only from CISA KEV.
Vendor response: Vendor response not established. A vendor fix does not mean a deployment is fixed.

## Affected components
- Packagist leantime/leantime: affected <= 3.1.4

## Suggested inspection (read-only)
- Packagist leantime/leantime: check the installed version with your package manager.

## Supported action
No complete vendor fix is recorded. Follow the primary source's mitigation guidance and check this record again before closing anything.

## Required regression checks
- Run the test suite and a production build.
- Exercise the features that depend on leantime/leantime.
- Repeat the inspection and confirm that only fixed versions remain installed.

## Rollback considerations
- Keep the previous lockfile and deployment artifact. Rolling back reinstates the vulnerable version, so apply any documented mitigation while you fix forward.

## Unresolved questions
- Which deployments run an affected version?
- Exploitation status can change. Check again before lowering the priority.
- Mark the work resolved only after the fixed version is verified in production.

## Sources
- Verified: https://github.com/advisories/GHSA-63cr-xg3f-8jvr (GitHub-reviewed advisory GHSA-63cr-xg3f-8jvr lists affected ranges: Packagist leantime/leantime >=0 <=3.1.4)

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