BaseFortify

Publication date: 2025-11-26

Last updated on: 2025-12-03

Assigner: GitHub, Inc.

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.

CVSS Scores

EPSS Scores

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Meta Information

Published

2025-11-26

Last Modified

2025-12-03

Generated

2026-07-06

AI Q&A

2025-11-26

EPSS Evaluated

2026-07-05

NVD

CVE-2025-65956

Affected Vendors & Products

Vendor	Product	Version / Range
formwork_project	formwork	to 2.2.0 (exc)

Helpful Resources

Exploitability

CWE

KEV

CWE ID	Description
CWE-79	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.

Attack-Flow Graph

Executive Summary

This vulnerability is a stored cross-site scripting (XSS) issue in the Formwork CMS prior to version 2.2.0. It occurs when unsanitized data is inserted into the blog tag field, allowing attacker-controlled scripts to be stored and executed in the browsers of users with CMS credentials who access or edit the affected blog post. This affects privileged administrative workflows and is persistent until patched in version 2.2.0.

Impact Analysis

The vulnerability can lead to attacker-controlled scripts executing in the browsers of users with CMS credentials, potentially allowing attackers to hijack user sessions, steal sensitive information, or perform unauthorized actions within the CMS. Since it affects privileged administrative workflows, it can compromise the integrity and security of the CMS and its content.

Mitigation Strategies

Upgrade Formwork CMS to version 2.2.0 or later, as this version contains the patch that fixes the stored cross-site scripting (XSS) vulnerability. Additionally, restrict access to the CMS to trusted users only and ensure that users with credentials are aware of the risk of executing attacker-controlled scripts when accessing or editing affected blog posts.

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