# CVE-2024-8556: Stored XSS in modelscope/agentscope

> Attackers can inject malicious JavaScript via run IDs in AgentScope, leading to arbitrary code execution in the victim's browser.

- **Severity:** Medium 6.1 (`CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Over the internet
- **Victim action needed:** A user has to click or open something
- **Fix available:** No
- **Published:** 20 Mar 2025
- **Updated:** 20 Mar 2025
- **Also known as:** GHSA-6mf6-7j75-2m6f, PYSEC-2026-1076

## What is CVE-2024-8556?

CVE-2024-8556 is a medium-severity cross-site scripting vulnerability in modelscope/agentscope, published on 20 Mar 2025. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.

### Official description

A stored cross-site scripting (XSS) vulnerability exists in modelscope/agentscope, as of the latest commit 21161fe on the main branch. The vulnerability occurs in the view for inspecting detailed run information, where a user-controllable string (run ID) is appended and rendered as HTML. This allows an attacker to execute arbitrary JavaScript code in the context of the user's browser.

Weakness: CWE-79 (Improper Neutralization of Input During Web Page Generation)

## Which versions are affected by CVE-2024-8556?

3 open source packages ship an affected version, including agentscope. It affects 1 product.


| Package | Ecosystem | Affected | Fixed in |
| --- | --- | --- | --- |
| `agentscope` | PyPI | All versions to 0.1.1 | None |
| `agentscope` | PyPI | All versions to 0.1.1 | None |
| `agentscope` | PyPI | All versions to 0.1.1 | None |

Products: Modelscope Agentscope.

## How do I fix CVE-2024-8556?

No fix has been published for CVE-2024-8556 yet. Limit exposure of the affected software until one is available.

## Is CVE-2024-8556 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2024-8556 exists.

## Other vulnerabilities in modelscope/agentscope

- [CVE-2024-48050](https://insights.sbomify.com/CVE-2024-48050/): AgentScope uses `eval` (critical 9.8)
- [CVE-2024-8537](https://insights.sbomify.com/CVE-2024-8537/): Path Traversal in modelscope/agentscope (critical 9.1)
- [CVE-2024-8551](https://insights.sbomify.com/CVE-2024-8551/): Path Traversal in modelscope/agentscope (critical 9.1)
- [CVE-2024-8438](https://insights.sbomify.com/CVE-2024-8438/): Path Traversal in modelscope/agentscope (high 7.5)
- [CVE-2024-8501](https://insights.sbomify.com/CVE-2024-8501/): Arbitrary File Download in modelscope/agentscope (high 7.5)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2024-8556 and fix it if it is affected.

What it is: CVE-2024-8556 is a medium-severity cross-site scripting vulnerability in modelscope/agentscope, published on 20 Mar 2025. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.
Exploitation: It is not confirmed as exploited in the wild, but public exploit code for CVE-2024-8556 exists.

Affected packages and fixed versions:
- agentscope (PyPI): affected all versions up to 0.1.1; no fix listed
- agentscope (PyPI): affected all versions up to 0.1.1; no fix listed
- agentscope (PyPI): affected all versions up to 0.1.1; 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/CVE-2024-8556/ (Markdown: https://insights.sbomify.com/CVE-2024-8556/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2024-8556
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2024-8556
- OSV: https://osv.dev/vulnerability/CVE-2024-8556

---
From sbomify Insights: https://insights.sbomify.com/CVE-2024-8556/
Summaries are generated and may contain mistakes; the official description above is the record.