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

> Stored XSS in Leantime allows attackers to execute scripts in victim browsers via webhook payloads, potentially stealing sessions or credentials.

- **Severity:** Not scored
- **Exploited in the wild:** Not known
- **Login needed:** Any signed-in user
- **Attackable:** Over the internet
- **Victim action needed:** A user has to click or open something
- **Fix available:** No
- **Published:** 21 Feb 2025

## What is GHSA-63cr-xg3f-8jvr?

GHSA-63cr-xg3f-8jvr is a cross-site scripting vulnerability in leantime/leantime, published on 21 Feb 2025. Any signed-in user can exploit it over the network, and only if a user opens a file or follows a link.

### Official 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.

## Which versions are affected by GHSA-63cr-xg3f-8jvr?

2 open source packages ship an affected version, including leantime/leantime.


| Package | Ecosystem | Affected | Fixed in |
| --- | --- | --- | --- |
| `leantime/leantime` | Packagist | All versions to 3.1.4 | None |
| `leantime/leantime` | Packagist | All versions to 3.1.4 | None |

## How do I fix GHSA-63cr-xg3f-8jvr?

No fix has been published for GHSA-63cr-xg3f-8jvr yet. Limit exposure of the affected software until one is available.

## Is GHSA-63cr-xg3f-8jvr being exploited?

There is no known exploitation of GHSA-63cr-xg3f-8jvr in the wild and no public exploit code.

## Fix prompt for AI coding agents

```text
Check this codebase for GHSA-63cr-xg3f-8jvr and fix it if it is affected.

What it is: GHSA-63cr-xg3f-8jvr is a cross-site scripting vulnerability in leantime/leantime, published on 21 Feb 2025. Any signed-in user can exploit it over the network, and only if a user opens a file or follows a link.
Exploitation: There is no known exploitation of GHSA-63cr-xg3f-8jvr in the wild and no public exploit code.

Affected packages and fixed versions:
- leantime/leantime (Packagist): affected all versions up to 3.1.4; no fix listed
- leantime/leantime (Packagist): affected all versions up to 3.1.4; no fix listed

Task:
1. Search the dependency manifests and lockfiles (for example package.json, package-lock.json, requirements.txt, poetry.lock, uv.lock, pom.xml, build.gradle, go.mod, Cargo.lock, Gemfile.lock) and any Dockerfiles for the affected packages, including transitive dependencies.
2. If an affected version is in use, upgrade it to the fixed version for its release line with the project's package manager, so the lockfile is regenerated. Prefer the smallest upgrade that fixes it.
3. If there is no fix, or the upgrade would break the build, do not guess: explain the risk and the safest workaround instead.
4. Run the tests and summarise what changed and why.
5. If nothing in the project is affected, say so and change nothing.

Reference: https://insights.sbomify.com/GHSA-63cr-xg3f-8jvr/ (Markdown: https://insights.sbomify.com/GHSA-63cr-xg3f-8jvr/index.md)
```

## Sources

- OSV: https://osv.dev/vulnerability/GHSA-63cr-xg3f-8jvr

---
From sbomify Insights: https://insights.sbomify.com/GHSA-63cr-xg3f-8jvr/
Summaries are generated and may contain mistakes; the official description above is the record.