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Fencer Vulns
critical 9.8

CVE-2024-55638 json

Drupal core - Moderately critical - Gadget chain - SA-CORE-2024-008

published 2024-11-20 23 mo ago modified 2026-09-08 2 mo ago also BIT-drupal-2024-55638 , DRUPAL-CORE-2024-008 , EUVD-2024-3473 , GHSA-gvf2-2f4g-jqf4

cvss
9.8
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
1.0%
EPSS 1.0% chance of exploitation in 30 days, percentile 62%
public exploits
0
none known

Summary

Deserialization of Untrusted Data vulnerability in Drupal Core allows Object Injection.This issue affects Drupal Core: from 7.0 before 7.102, from 8.0.0 before 10.2.11, from 10.3.0 before 10.3.9.

Drupal core contains a chain of methods that is exploitable when an insecure deserialization vulnerability exists on the site. This so-called gadget chain presents no direct threat but is a vector that can be used to achieve remote code execution if the application deserializes untrusted data due to another vulnerability.

Patch / fix

  • packagist drupal/core 7.102, 10.2.11, 10.3.9
  • packagist drupal/core-recommended 7.102, 10.2.11, 10.3.9
  • packagist drupal/drupal 7.102, 10.2.11, 10.3.9
  • bitnami drupal 10.3.9
  • Drupal Drupal Core 7.102, 10.2.11, 10.3.9

CISA SSVC

Exploitation
none
Automatable
yes
Technical impact
total
Assessed
22 mo ago

Exploit prediction

0.98% chance of exploitation in the next 30 days, higher than 62% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
CISA ADP 3.1 9.8 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
GitHub 3.1 9.8 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
CNA 3.1 9.8 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
OSV 3.1 9.8 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Affected packages

ecosystem package affected fixed in
packagist drupal/core
>=8.8.0, <10.2.11
>=10.3.0, <10.3.9
>=7.0, <7.102
>=8.0.0, <10.2.11
10.2.11
10.3.9
7.102
packagist drupal/core-recommended
>=8.8.0, <10.2.11
>=10.3.0, <10.3.9
>=7.0, <7.102
10.2.11
10.3.9
7.102
packagist drupal/drupal
>=8.8.0, <10.2.11
>=10.3.0, <10.3.9
>=7.0, <7.102
10.2.11
10.3.9
7.102
bitnami drupal
>=7.0.0, <10.3.9
10.3.9

Affected products

  • Drupal Drupal Core

Classification

Weakness
  • CWE-915 Improperly Controlled Modification of Dynamically-Determined Object Attributes
  • CWE-502 Deserialization of Untrusted Data

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.