GHSA-7j46-f57w-76pj
MEDIUMFormwork CMS has Stored Cross-Site Scripting Vulnerebility in Blog Tags
EPSS Exploitation Probability
EPSS (Exploit Prediction Scoring System) is a daily probability model maintained by FIRST.org. It estimates the likelihood a CVE will be exploited in production environments within the next 30 days, derived from real-world threat intelligence signals.
Blast Radius
getformwork/formworkReal-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
Summary
Inserting unsanitized data into the blog tag field in Formwork CMS 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. Because the issue is persistent and impacts privileged administrative workflows, the severity is elevated.
Details
Formwork CMS fails to properly sanitize data inserted into tags, before saving them and rendering them into the edit blog interface. When a specially crafted tag becomes saved as a tag into the system, it is unable to be removed. Any attempt to remove the tag from the affected post, causes the XSS to trigger once again.
Additionally, once the malicious tag is present, managing standard tags becomes impossible. This is due to script execution on attempted modification. This leads to a form of interface lockout where the payload continually reinserts itself due to the stored, unsafe rendering.
Impact
This is a stored cross‑site scripting (XSS) vulnerability.
This impacts all users who access the affected blog post’s edit page.
Patches
Formwork 2.2.0 ensures proper escaping of user input in tag fields.
Affected Packages
| Ecosystem | Package | Vulnerable range | Fix |
|---|---|---|---|
| 🐘Packagist | getformwork/formwork | all versions | 2.2.0 |
Detection & mitigation playbook
Open-source dependencyDetect
Scan your dependency tree (package-lock.json, pnpm-lock.yaml, requirements.txt, go.sum, etc.) for getformwork/formwork. O3's reachability analysis confirms whether the vulnerable code path is actually invoked in your application, so you act on real exposure instead of every transitive match.
Fix
Update getformwork/formwork to 2.2.0 or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms GHSA-7j46-f57w-76pj is resolved across your whole dependency graph.
Workarounds
If you can't upgrade right away: gate or disable the affected feature, validate untrusted input at the boundary, and avoid passing attacker-controlled data into the vulnerable path. O3's runtime protection blocks exploitation in production as an interim safeguard until the upgrade lands.
How O3 protects you
O3 pinpoints whether GHSA-7j46-f57w-76pj is reachable in your code and exactly where to fix it, then blocks exploitation in production at runtime until the patched version is deployed.
Tailored to GHSA-7j46-f57w-76pj. Runtime protection reduces exposure until a permanent patch is applied and verified — it complements patching, it doesn't replace it.
Frequently Asked Questions
Is GHSA-7j46-f57w-76pj in your dependencies?
O3 detects GHSA-7j46-f57w-76pj across Packagist dependencies and uses function-level reachability to confirm whether the vulnerable code path is actually reachable — not just present. No false positives.