CVE-2023-37280 is a medium-severity (CVSS 5) Cross-site Scripting (XSS) vulnerability in pimcore/admin-ui-classic-bundle. A fix is available for pimcore/admin-ui-classic-bundle — see the affected versions and patch details below.
Pimcore admin UI vulnerable to Cross-site Scripting in two factor authentication setup page
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-2023-37280.
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-2023-37280 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 378,156 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
pimcore/admin-ui-classic-bundleReal-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
Unauthenticated HTML Injection / XSS Possible. Conditions: 2factor authentication must not set before
Vulnerable Endpoint: /admin/login/2fa-setup
Vulnerable Param: error= How it works, So basically any admin, who has not setup 2 factor authentication before is vulnerable for this attack, without need for any form of privilege, causing the application to execute arbitrary scripts / HTML Contents.
Another potential attack vector, as it's a 2fa page and it has QR Code, attacker can replace this QR Code with something he has, leading to increase threat to the admin.
This attack can be used to execute arbitrary scripts or HTML Injection, causing the target application to execute these resulting in cookie steeling, defacement or Injecting phishing URLs on the target application.
Patches
Update to version 1.0.3 or apply this patches manually https://github.com/pimcore/admin-ui-classic-bundle/commit/5fcd19bdc89a3fe4cb8ad8c356590e1e4740c743.patch
Workarounds
Apply patches manually: https://github.com/pimcore/admin-ui-classic-bundle/commit/5fcd19bdc89a3fe4cb8ad8c356590e1e4740c743.patch
References
https://huntr.dev/bounties/1fa1cc3b-75ff-4d34-99ae-4a705eb623e7/
Affected Packages
| Ecosystem | Package | Vulnerable range | Fix |
|---|---|---|---|
| 🐘Packagist | pimcore/admin-ui-classic-bundle | all versions | 1.0.3composer require pimcore/admin-ui-classic-bundle:^1.0.3 |
Detection & mitigation playbook
Open-source dependencyDetect
Scan your dependency tree (package-lock.json, pnpm-lock.yaml, requirements.txt, go.sum, etc.) for pimcore/admin-ui-classic-bundle, including transitive dependencies — a direct dependency you never call can still pull in a vulnerable version.
Fix
Update pimcore/admin-ui-classic-bundle to 1.0.3 or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms CVE-2023-37280 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-2023-37280 can be triaged on real exposure rather than presence alone.
Tailored to CVE-2023-37280. 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-2023-37280 in your dependencies?
O3 Security finds CVE-2023-37280 across Packagist dependencies, including transitive ones, and its impact-aware SCA ranks findings by whether your code actually calls the vulnerable path.