GHSA-63cr-xg3f-8jvr: Leantime/leantime Cross-Site Scripting Vulnerability

MODERATE
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CWE-79
Published
Advisory Summary

GHSA-63cr-xg3f-8jvr is a MODERATE cross-site scripting vulnerability (CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')) affecting Leantime/leantime libraries in the Packagist ecosystem. The issue involves leantime allows stored cross-site scripting (xss). Remediation is available in the latest vendor maintenance releases.

GHSA-63cr-xg3f-8jvr at a Glance

CVE Identifier N/A
GHSA Identifier GHSA-63cr-xg3f-8jvr
Severity MODERATE
CVSS v3.1 Base Score N/A
CWE Classification CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
Affected Product Leantime/leantime
Package Ecosystem Packagist
Published Date
Last Updated

How to Fix GHSA-63cr-xg3f-8jvr

To remediate this vulnerability, upgrade all affected Leantime/leantime dependencies to a patched release. Both direct and transitive dependencies should be checked, as frameworks or security libraries may pull in vulnerable versions transitively.

leantime/leantime fixed: Latest secure release 
Upgrade leantime/leantime to Latest secure release
Verify Direct and Transitive Dependencies

Run the following command in your project directory to verify that all resolved dependencies use the patched release: 

inspect dependencies for leantime/leantime

How to Check if You Are Affected

To determine whether your application is affected by GHSA-63cr-xg3f-8jvr, inspect your project dependencies for Leantime/leantime:

inspect dependencies for leantime/leantime

Analyze the terminal output to locate any version of Leantime/leantime in your dependency tree. If any resolved version matches the vulnerable ranges listed in the table below (for example, versions earlier than the patched release), your application is affected.

Note: Verify declared build manifests and deployed runtime container environments.

Technical Details

Vulnerability Mechanism & Technical Analysis

This vulnerability is classified under CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting'), where the product does not neutralize or incorrectly neutralizes user-controllable input before it is placed in output that is used as a web page that is served to other users. In Leantime/leantime, software state validation or input boundaries are circumvented during processing. Review the official source advisory statement below for specific affected components, classes, and reproduction details.

Source Advisory Statement

### 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.

GHSA-63cr-xg3f-8jvr Affected Leantime/leantime Versions

1 component(s)
Product / Package Ecosystem Affected Versions Fixed Version
leantime/leantime
 Packagist
≤ 3.1.4

References

GitHub Advisory / Wiki ADVISORY
https://github.com/Leantime/leantime/security/advisories/GHSA-63cr-xg3f-8jvr
Leantime/leantime Source Repository REPOSITORY
https://github.com/Leantime/leantime
youtu.be/kqkfgsoqstg WEB
https://youtu.be/kqKFgsOqstg

Frequently Asked Questions

What is GHSA-63cr-xg3f-8jvr?
GHSA-63cr-xg3f-8jvr is a security vulnerability in Leantime/leantime involving Leantime allows Stored Cross-Site Scripting (XSS) under CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting').
Which Leantime/leantime versions are affected?
Affected versions include releases prior to current release patches across affected packages: leantime/leantime.
What version fixes GHSA-63cr-xg3f-8jvr?
Upgrading to current release patches (or the latest patched release for your respective branch) resolves the vulnerability.
Is leantime/leantime affected?
Yes, leantime/leantime is affected in releases prior to Latest secure release. Upgrade your dependency to Latest secure release or later.
What CWE is associated with GHSA-63cr-xg3f-8jvr?
GHSA-63cr-xg3f-8jvr is classified under CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') (The product does not neutralize or incorrectly neutralizes user-controllable input before it is placed in output that is used as a web page that is served to other users.).
How can I check Packagist dependencies for GHSA-63cr-xg3f-8jvr?
Run the dependency tree command: 'inspect dependencies for leantime/leantime'. This command lists direct and transitive dependencies in your build configuration so you can verify if a vulnerable version is resolved.
Machine-readable OSV JSON OSV v1.5 Schema
Normalized schema output
View Raw JSON 
{
  "schema_version" : "1.4.0",
  "id" : "GHSA-63cr-xg3f-8jvr",
  "modified" : "2025-02-21T22:15:52Z",
  "published" : "2025-02-21T22:15:52Z",
  "aliases" : [ ],
  "summary" : "Leantime allows Stored Cross-Site Scripting (XSS)",
  "details" : "### Summary\nStored 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. \n\n### Details\nA Stored Cross-Site Scripting (XSS) vulnerability was found that could potentially compromise user data and pose a significant security risk to the platform.\n\n### PoC\n\n- Create a project\n- Navigate to project\n- Visit to the integration\n- Add malicious payload inside the webhook and save it.\n- Notice the alert dialogue indicating successful execution of the XSS payload.\n```\n'';!--\" onfocus=alert(0) autofocus=\"\"  onload=alert(3);=\"&{(alert(1))}\" |=\"\" mufazmi\"=\"\n```\n```\n'';!--\" onfocus=alert(0) autofocus=\"\"  onload=alert(3);=>>\"&{(alert(1))}\" |=\"\">> mufazmi\"=\">>\n```\n### POC\nhttps://youtu.be/kqKFgsOqstg\n\n\n### Impact\nThis 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.",
  "severity" : [ {
    "type" : "CVSS_V4",
    "score" : "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"
  } ],
  "affected" : [ {
    "package" : {
      "ecosystem" : "Packagist",
      "name" : "leantime/leantime"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "0"
      }, {
        "last_affected" : "3.1.4"
      } ]
    } ]
  } ],
  "references" : [ {
    "type" : "WEB",
    "url" : "https://github.com/Leantime/leantime/security/advisories/GHSA-63cr-xg3f-8jvr"
  }, {
    "type" : "PACKAGE",
    "url" : "https://github.com/Leantime/leantime"
  }, {
    "type" : "WEB",
    "url" : "https://youtu.be/kqKFgsOqstg"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-79" ],
    "severity" : "MODERATE",
    "github_reviewed" : true,
    "github_reviewed_at" : "2025-02-21T22:15:52Z",
    "nvd_published_at" : null
  }
}