How severe is CVE-2025-30166?

No CVSS score has been assigned to CVE-2025-30166 yet. Review the advisory details and affected package list to assess your exposure.

Which packages are affected by CVE-2025-30166?

CVE-2025-30166 affects the following packages: pimcore/admin-ui-classic-bundle (Packagist). Ecosystems affected: Packagist.

How do I fix CVE-2025-30166?

Update pimcore/admin-ui-classic-bundle to 1.7.6 or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms CVE-2025-30166 is resolved across your whole dependency graph.

How do I detect CVE-2025-30166 in my Packagist dependencies?

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.

How do I mitigate CVE-2025-30166 if there is no patch (or I can't update yet)?

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 does O3 Security protect against CVE-2025-30166?

O3 Security's impact-aware SCA analyses which vulnerable code paths your application actually calls, so a match like CVE-2025-30166 can be triaged on real exposure rather than presence alone.

Is CVE-2025-30166 actively exploited in the wild?

No public exploit code has been indexed for CVE-2025-30166 yet. This does not mean the vulnerability cannot be exploited — absence of public exploits does not imply safety. Apply the recommended fix and use O3 Security to monitor your exposure.

What is the EPSS score for CVE-2025-30166?

CVE-2025-30166 has an EPSS (Exploit Prediction Scoring System) score of 0.2%, placing it in the 16th percentile of all CVEs. EPSS is maintained by FIRST.org and estimates the probability that a vulnerability will be exploited in the wild within the next 30 days. This score indicates relatively lower exploitation probability, though the CVSS severity should still guide your patching priority.

What type of vulnerability is CVE-2025-30166?

CVE-2025-30166 is classified as Cross-site Scripting (XSS) (CWE-79). This weakness type describe the underlying flaw category, which helps determine the potential impact and the right class of mitigation. This is a high-impact weakness class that often enables remote code execution or data exposure.

When was CVE-2025-30166 published, and has it been updated?

CVE-2025-30166 was published on April 8, 2025 and was last updated on August 12, 2026. Advisory data evolves as severity scores, affected ranges, and exploit intelligence are revised — always check the latest version of the advisory before acting.

🐘 Packagist

Not in CISA KEV

CVE-2025-30166 — pimcore/admin-ui-classic-…

Fix: pimcore/admin-ui-classic-bundle@76b690d

CVE-2025-30166 is a 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's Admin Classic Bundle allows HTML Injection

Also known asGHSA-x82r-6j37-vrgg

Published

Apr 8, 2025

Updated

Aug 12, 2026

Affected

1 pkg

Patched

1 / 1

Exploits

None indexed

Exploitation data as of Sep 22, 2026 · OSV.dev, NVD, FIRST.org (EPSS)

Exploitation Status

Proof-of-concept exploit code exists

CISA’s SSVC triage found public proof-of-concept exploit code for this CVE, though no confirmed active exploitation.

Exploitation and automatability from CISA’s SSVC triage for CVE-2025-30166.

EPSS Exploitation Probability

via FIRST.org ↗

0.2%probability of exploitation in next 30 days

Lower Risk0.00%

Lower risk than most CVEs16th percentile — riskier than 16% of all scored CVEsHighest risk

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.

Real-World Exposure

1 pkg affected

🐘pimcore/admin-ui-classic-bundle

Real-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

An HTML injection issue allows users with access to the email sending functionality to inject arbitrary HTML code into emails sent via the admin interface, potentially leading to session cookie theft and the alteration of page content.

Details

The vulnerability was discovered in the /admin/email/send-test-email endpoint using the POST method. The vulnerable parameter is content, which permits the injection of arbitrary HTML code during the email sending process. While JavaScript code injection is blocked through filtering, HTML code injection remains possible.

PoC

To reproduce the vulnerability, a user must fill out the email's content form with the desired HTML payload. send-test-mail-text

Impact

mail-text

This HTML injection vulnerability can potentially enable phishing attacks by allowing the insertion of any html like fake login forms, etc. All functionalities that process user input should be carefully reviewed to ensure that data is appropriately encoded as HTML entities in server responses. For instance, a reflected input paramete like <h1> just a test </h1> <p> <img> should be displayed in the HTML response as <h1> just a test </h1> <p> <img>.

Affected Packages

1 total 1 fixed

Ecosystem	Package	Vulnerable range	Fix
🐘Packagist	`pimcore/admin-ui-classic-bundle`	all versions	1.7.6`composer require pimcore/admin-ui-classic-bundle:^1.7.6`

Detection & mitigation playbook

Open-source dependency

Detect
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 1.7.6 or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms CVE-2025-30166 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-2025-30166 can be triaged on real exposure rather than presence alone.

Tailored to CVE-2025-30166. Runtime protection reduces exposure until a permanent patch is applied and verified — it complements patching, it doesn't replace it.

Frequently Asked Questions

### Summary An HTML injection issue allows users with access to the email sending functionality to inject arbitrary HTML code into emails sent via the admin interface, potentially leading to session cookie theft and the alteration of page content. ### Details The vulnerability was discovered in the `/admin/email/send-test-email` endpoint using the `POST` method. The vulnerable parameter is `content`, which permits the injection of arbitrary HTML code during the email sending process. While JavaScript code injection is blocked through filtering, HTML code injection remains possible. ### PoC T

O3 Security · Impact-Aware SCA

Is CVE-2025-30166 in your dependencies?

O3 Security finds CVE-2025-30166 across Packagist dependencies, including transitive ones, and its impact-aware SCA ranks findings by whether your code actually calls the vulnerable path.

Scan my dependencies How O3 SCA works