CVE-2024-55637
Project: Drupal core Date: 2024-November-20 Security risk: Moderately critical 14 ∕ 25 AC:Complex/A:Admin/CI:All/II:All/E:Theoretical/TD:Uncommon Vulnerability: Gadget chain Affected versions: >= 8.0.0 < 10.2.11 || >= 10.3.0 < 10.3.9 || >= 11.0.0 < 11.0.8 CVE IDs: CVE-2024-55637 Description: Drupal core contains a potential PHP Object Injection vulnerability that (if combined with another exploit) could lead to Remote Code Execution. It is not directly exploitable. This issue is mitigated by the fact that in order for it to be exploitable, a separate vulnerability must be present to allow an attacker to pass unsafe input to unserialize() . There are no such known exploits in Drupal core. To help protect against this potential vulnerability, types have been added to properties in some of Drupal core's classes. If an application extends those classes, the same types may need to be specified on the subclass to avoid a TypeError . Solution: Install the latest version: If you are using Drupal 10.2, update to Drupal 10.2.11. If you are using Drupal 10.3, update to Drupal 10.3.9. If you are using Drupal 11.0, update to Drupal 11.0.8. Drupal 7 is not affected. All versions of Drupal 10 prior to 10.2 are end-of-life and do not receive security coverage. ( Drupal 8 and Drupal 9 have both reached end-of-life.) Reported By: Drew Webber of the Drupal Security Team Fixed By: Drew Webber of the Drupal Security Team Lee Rowlands of the Drupal Security Team Coordinated By: Juraj Nemec of the Drupal Security Team Greg Knaddison of the Drupal Security Team Benji Fisher of the Drupal Security Team xjm of the Drupal Security Team
CSIRTS triage
- What
- Contains a potential PHP Object Injection vulnerability that could lead to Remote Code Execution.
- Who is affected
- Users of affected Drupal versions.
- Urgency
- Critical due to the potential for remote code execution if combined with another exploit.
- Action
- Upgrade to a version that is not affected.
AI-assisted analysis generated from the source advisory — verify against the original.
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Exploitation outlook
- Low exploitation risk0.80% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 52% of all EPSS-scored CVEs.
Advisory coverage (1)
- criticalDrupal core - Moderately critical - Gadget chain - SA-CORE-2024-007drupal · 2024-11-20
External references
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[](https://www.csirts.com/cve/CVE-2024-55637)