CVE-2025-65956: formwork XSS — Exploit & Fix

Description

Formwork is a flat file-based Content Management System (CMS). Prior to version 2.2.0, inserting unsanitized data into the blog tag field results in stored cross‑site scripting (XSS). Any user with credentials to the Formwork CMS who accesses or edits an affected blog post will have attacker‑controlled script executed in their browser. The issue is persistent and impacts privileged administrative workflows. This issue has been patched in version 2.2.0.

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CVSS v3.1 Score

6.5

MEDIUM

CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:L

Weakness Type (CWE)

CWE-79 Cross-site Scripting (XSS)

Affected Products

Vendor	Product	Versions
formwork_project	formwork	< 2.2.0

References

Advisories & Patches

https://github.com/getformwork/formwork/commit/4abcd60ae7692b46d316f956b0b20fb85336f3b2 https://github.com/getformwork/formwork/pull/791

Exploits

https://github.com/getformwork/formwork/security/advisories/GHSA-7j46-f57w-76pj https://github.com/getformwork/formwork/security/advisories/GHSA-7j46-f57w-76pj

Frequently Asked Questions

What is CVE-2025-65956? +

Formwork is a flat file-based Content Management System (CMS). Prior to version 2.2.0, inserting unsanitized data into the blog tag field results in stored cross‑site scripting (XSS). Any user with credentials to the Formwork CMS who accesses or edits an affected blog post will have attacker‑controlled script executed in their browser. The issue is persistent and impacts privileged administrative workflows. This issue has been patched in version 2.2.0. It has a CVSS v3.1 base score of 6.5 (MEDIUM).

How severe is CVE-2025-65956? +

CVE-2025-65956 has a CVSS v3.1 score of 6.5 out of 10, rated MEDIUM. This is a medium-severity vulnerability that should be remediated as part of regular maintenance.

What products are affected by CVE-2025-65956? +

CVE-2025-65956 affects products from formwork_project, specifically: formwork. Check the affected products table above for specific version ranges.

How do I check if I'm vulnerable to CVE-2025-65956? +

You can use Secably's free Website Scanner to check your website for known vulnerabilities. For infrastructure scanning, use the Port Scanner to identify exposed services that may be affected. Check the vendor advisories linked above for specific patch and version information.

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