How severe is CVE-2024-37156?

CVE-2024-37156 has a CVSS score of 6.1/10, rated MEDIUM. Review your exposure and patch according to your risk tolerance.

Which packages are affected by CVE-2024-37156?

CVE-2024-37156 affects the following packages: sulu/form-bundle (Packagist). Ecosystems affected: Packagist.

How do I fix CVE-2024-37156?

Update sulu/form-bundle to 2.5.3 or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms CVE-2024-37156 is resolved across your whole dependency graph.

How do I detect CVE-2024-37156 in my Packagist dependencies?

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

How do I mitigate CVE-2024-37156 if there is no patch (or I can't update yet)?

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.

Is CVE-2024-37156 actively exploited in the wild?

No public exploit code has been indexed for CVE-2024-37156 yet. This does not mean the vulnerability cannot be exploited — absence of public exploits does not imply safety. Apply the recommended fix and use O3 Security to monitor your exposure.

What is the EPSS score for CVE-2024-37156?

CVE-2024-37156 has an EPSS (Exploit Prediction Scoring System) score of 0.3%, placing it in the 22th percentile of all CVEs. EPSS is maintained by FIRST.org and estimates the probability that a vulnerability will be exploited in the wild within the next 30 days. This score indicates relatively lower exploitation probability, though the CVSS severity should still guide your patching priority.

What type of vulnerability is CVE-2024-37156?

CVE-2024-37156 is classified as Cross-site Scripting (XSS) (CWE-79), CWE-80 (CWE-80). These weakness types describe the underlying flaw category, which helps determine the potential impact and the right class of mitigation. This is a high-impact weakness class that often enables remote code execution or data exposure.

When was CVE-2024-37156 published, and has it been updated?

CVE-2024-37156 was published on June 6, 2024 and was last updated on October 28, 2026. Advisory data evolves as severity scores, affected ranges, and exploit intelligence are revised — always check the latest version of the advisory before acting.

🐘

🐘 Packagist

Not in CISA KEV

MEDIUM severity

CVE-2024-37156 — form-bundle

MEDIUMFix: sulu/SuluFormBundle@3f341b7

CVE-2024-37156 is a medium-severity (CVSS 6.1) Cross-site Scripting (XSS) vulnerability in sulu/form-bundle. A fix is available for sulu/form-bundle — see the affected versions and patch details below.

TokenController formName not sanitized in hidden input

Also known asGHSA-rrvc-c7xg-7cf3

Published

Jun 6, 2024

Updated

Oct 28, 2026

Affected

1 pkg

Patched

1 / 1

Exploits

None indexed

Exploitation data as of Oct 31, 2026 · OSV.dev, NVD, FIRST.org (EPSS)

Exploitation Status

No confirmed exploitation observed yet

CISA’s own triage has not observed active exploitation or public proof-of-concept code for this CVE as of its last assessment.

Exploitation and automatability from CISA’s SSVC triage for CVE-2024-37156.

EPSS Exploitation Probability

via FIRST.org ↗

0.3%probability of exploitation in next 30 days

Lower Risk0.00%

Lower risk than most CVEs22th percentile — riskier than 22% of all scored CVEsHighest risk

Probability of exploitation in the next 30 days, from FIRST.org EPSS.

How urgent is this, really

Where this sits among everything scored

Real-World Exposure

1 pkg affected

🐘sulu/form-bundle

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

Impact

TokenController get parameter formName not sanitized in returned input field leads to XSS.

What kind of vulnerability is it? Who is impacted?

Patches

Has the problem been patched? What versions should users upgrade to?

Workarounds

Is there a way for users to fix or remediate the vulnerability without upgrading?

Create a custom Symfony Request listener which checks for the get value of form for the TokenController and if not valid stop the request dispatching and return a error status code.

References

Are there any links users can visit to find out more?

Affected Packages

1 total 1 fixed

Ecosystem	Package	Vulnerable range	Fix
🐘Packagist	`sulu/form-bundle`	≥ 2.0.0&&< 2.5.3	2.5.3`composer require sulu/form-bundle:^2.5.3`

Affected Products

1 product · 1 configurations

Application

suluformbundlesulu

≥ 2.0.0 && < 2.5.3

range

Detection & mitigation playbook

Open-source dependency

Detect
Scan your dependency tree (package-lock.json, pnpm-lock.yaml, requirements.txt, go.sum, etc.) for sulu/form-bundle, including transitive dependencies — a direct dependency you never call can still pull in a vulnerable version.
Fix
Update sulu/form-bundle to 2.5.3 or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms CVE-2024-37156 is resolved across your whole dependency graph.
Workarounds
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

### Impact TokenController get parameter formName not sanitized in returned input field leads to XSS. _What kind of vulnerability is it? Who is impacted?_ ### Patches _Has the problem been patched? What versions should users upgrade to?_ ### Workarounds _Is there a way for users to fix or remediate the vulnerability without upgrading?_ Create a custom Symfony Request listener which checks for the get value of `form` for the TokenController and if not valid stop the request dispatching and return a error status code. ### References _Are there any links users can visit to find out more?