CVE-2026-32278 is a high-severity (CVSS 8.2) Unrestricted File Upload vulnerability in opensource-workshop/connect-cms. A fix is available for opensource-workshop/connect-cms — see the affected versions and patch details below.
Connect CMS has Stored Cross-site Scripting (XSS) in the File Field of its Form Plugin
Exploitation Status
No confirmed exploitation observed yet
- A successful exploit gives an attacker total control of the affected component, not partial access.
- 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-2026-32278.
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.
How urgent is this, really
CVE-2026-32278 plotted by exploitation likelihood (EPSS) against impact (CVSS). The shaded corner — EPSS 50%+ and CVSS 7.0+ — is where this CVE doesn't sit, though severity or exploitability alone can still warrant action.
Where this sits among everything scored
Of 378,567 CVEs with a current EPSS score, this one falls in the < 10% band (highlighted). Real counts from FIRST.org, not a sample — log-scaled since the landscape is heavily right-skewed.
Real-World Exposure
opensource-workshop/connect-cms🐘opensource-workshop/connect-cmsReal-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
Security Advisory — Form Plugin (Stored XSS)
Summary
A Stored Cross-site Scripting (XSS) issue exists in the file field of the Form Plugin.
Affected Versions
- 1.x series: <= 1.41.0
- 2.x series: <= 2.41.0
Patched Versions
- 1.41.1
- 2.41.1
Description
In the file field of the Form Plugin, Stored Cross-site Scripting (XSS) could occur. If exploited, arbitrary script could run in an administrator's browser, which may lead to unauthorized actions or information theft. Users affected by this vulnerability should update to a fixed version.
Solution
Update to the fixed version. For the 1.x series, update to 1.41.1 or later. For the 2.x series, update to 2.41.1 or later.
Credits
OpenSource WorkShop thanks Sho Odagiri (小田切 祥) of GMO Cybersecurity by Ierae, Inc. for reporting this vulnerability.
Affected Packages
| Ecosystem | Package | Vulnerable range | Fix |
|---|---|---|---|
| 🐘Packagist | opensource-workshop/connect-cms | all versions | 1.41.1composer require opensource-workshop/connect-cms:^1.41.1 |
| 🐘Packagist | opensource-workshop/connect-cms | ≥ 2.0.0&&< 2.41.1 | 2.41.1composer require opensource-workshop/connect-cms:^2.41.1 |
Detection & mitigation playbook
Open-source dependencyDetect
Scan your dependency tree (package-lock.json, pnpm-lock.yaml, requirements.txt, go.sum, etc.) for opensource-workshop/connect-cms, including transitive dependencies — a direct dependency you never call can still pull in a vulnerable version.
Fix
Update opensource-workshop/connect-cms to 1.41.1 or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms CVE-2026-32278 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 Security's impact-aware SCA analyses which vulnerable code paths your application actually calls, so a match like CVE-2026-32278 can be triaged on real exposure rather than presence alone.
Tailored to CVE-2026-32278. Runtime protection reduces exposure until a permanent patch is applied and verified — it complements patching, it doesn't replace it.
Frequently Asked Questions
Is CVE-2026-32278 in your dependencies?
O3 Security finds CVE-2026-32278 across Packagist dependencies, including transitive ones, and its impact-aware SCA ranks findings by whether your code actually calls the vulnerable path.