Summary
The Media Library module has a security vulnerability whereby it doesn't sufficiently restrict access to media items in certain configurations.
Solution:
If you are using Drupal 8.7.x, you should upgrade to Drupal 8.7.11.
If you are using Drupal 8.8.x, you should upgrade to Drupal 8.8.1.
Versions of Drupal 8 prior to 8.7.x are end-of-life and do not receive security coverage.
Alternatively, you may mitigate this vulnerability by unchecking the "Enable advanced UI" checkbox on /admin/config/media/media-library. (This mitigation is not available in 8.7.x.)
Impact
GHSA-MH4H-27GQ-CXWJ has a CVSS score of 4.3 (Medium). The vector is network-reachable, low privileges required, and no user interaction. A CVSS score reflects the worst-case severity of the vulnerability, not your specific exposure. Whether this affects your application depends on whether the vulnerable code is present and reachable in your environment. A fixed version is available (8.7.11, 8.8.1); upgrading removes the vulnerable code path.
Affected versions
Security releases
Kodem intelligence
Severity tells you how bad this could be in the worst case. It does not tell you whether you are exposed. Exploitability and impact are functions of runtime truth: whether the vulnerable code is present, reachable, and actually executes in your application. A vulnerable package can sit in your dependency tree and never run.
Kodem, an Intelligent Application Security platform, uses runtime intelligence to reveal which vulnerabilities actually execute in production, so teams prioritize the ones that genuinely matter. Kodem's runtime-powered SCA identifies whether this CVE is reachable in your applications.
Remediation advice
drupal/core to 8.7.11 or later; drupal/core to 8.8.1 or later
Kodem Kai can prioritize this vulnerability in your dependency tree and generate a fix recommendation.
Frequently Asked Questions
- What is GHSA-MH4H-27GQ-CXWJ? GHSA-MH4H-27GQ-CXWJ is a medium-severity security vulnerability in drupal/core (composer), affecting versions >= 8.0.0, < 8.7.11. It is fixed in 8.7.11, 8.8.1.
- How severe is GHSA-MH4H-27GQ-CXWJ? GHSA-MH4H-27GQ-CXWJ has a CVSS score of 4.3 (Medium). This score reflects the worst-case severity of the vulnerability, not your specific exposure. Whether it represents real risk in your environment depends on whether the vulnerable code is present and reachable.
- Which versions of drupal/core are affected by GHSA-MH4H-27GQ-CXWJ? drupal/core (composer) versions >= 8.0.0, < 8.7.11 is affected.
- Is there a fix for GHSA-MH4H-27GQ-CXWJ? Yes. GHSA-MH4H-27GQ-CXWJ is fixed in 8.7.11, 8.8.1. Upgrade to this version or later.
- Is GHSA-MH4H-27GQ-CXWJ exploitable, and should I be worried? Whether GHSA-MH4H-27GQ-CXWJ is exploitable in your environment depends on whether the vulnerable code is present and reachable. A CVSS score is a worst-case rating; it does not account for your specific deployment, configuration, or usage patterns. Kodem, an Intelligent Application Security platform, uses runtime intelligence to show which vulnerabilities actually execute in production, so you can focus on the ones that represent real risk. Get a demo
- What actually determines whether GHSA-MH4H-27GQ-CXWJ is exploitable, and how bad it is? Exploitability and impact are not fixed properties of a CVE. They depend on runtime truth: whether the vulnerable code is present, reachable, and actually executes in your application. A high CVSS score on a dependency that never runs is not the same as real risk. Kodem, an Intelligent Application Security platform, uses runtime intelligence to reveal which vulnerabilities actually execute in production, so teams prioritize the ones that genuinely matter.
- How do I fix GHSA-MH4H-27GQ-CXWJ?
- Upgrade
drupal/coreto 8.7.11 or later - Upgrade
drupal/coreto 8.8.1 or later
- Upgrade