CVE-2024-55638 | Drupal core - Moderately critical - Gadget chain - SA-CORE-2024-008

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.

Published: 2024-12-10 Last update: 2025-06-02 Assigner: [email protected] Source: [email protected]
NVD Status：Analyzed，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2024-55638 is rated Moderate Risk (54/100): CVSS Critical severity, with medium exploitation likelihood (EPSS 0.96%). Review affected assets and schedule remediation.

Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.

Exploit prediction scoring system (EPSS) score for CVE-2024-55638

EPSS lead: Daily EPSS estimates relative likelihood of exploitation; percentile ranks this CVE among scored vulnerabilities (higher = more severe relative rank).

# Date Old EPSS score New EPSS score Delta (New - Old)
1 2026-06-15 9.93% 0.96% -8.98%
2 2026-06-11 9.69% 9.93% +0.25%
3 2026-05-29 — 9.69% —

Full EPSS history (51 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2024-55638

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
9.8 3.1 CRITICAL
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H Click to expand
Attack vector (AV:N)
Could be attacked over the internet or any normal routed network—not just someone sitting at the machine.
Attack complexity (AC:L)
Once they can reach the bug, pulling it off is straightforward—no weird race conditions or rare setup.
Privileges required (PR:N)
No account or special rights needed—anonymous or random user is enough.
User interaction (UI:N)
Nobody has to click “OK” or open a trap file; it can work without a victim helping.
Scope (S:U)
Damage stays in the same “trust bubble” as the broken component—no big spill into unrelated systems.
Confidentiality (C:H)
Serious risk that confidential data gets exposed in a big way.
Integrity (I:H)
They could widely tamper with or forge data—trust in the data is badly hurt.
Availability (A:H)
Could take the service down hard or make it unusable for people who depend on it.
 3.9 5.9 134c704f-9b21-4f2e-91b3-4a467353bcc0

Weakness enumeration for CVE-2024-55638

GitHub Security Advisory for CVE-2024-55638

GHSA-gvf2-2f4g-jqf4 · Severity: high · Ecosystem: composer — Drupal core contains a potential PHP Object Injection vulnerability

OS Trackers for CVE-2024-55638

vendor priority summary link
ubuntu medium CVE-2024-55638 medium priority: Ubuntu including 1 source packages (drupal7), 9 status rows across 9 suites (focal, jammy, noble, oracular, plucky, questing, trusty, upstream, xenial): DNE 6, needs-triage 3. https://ubuntu.com/security/CVE-2024-55638

Affected software / configurations for CVE-2024-55638

Vendor Product Version Raw CPE
drupal drupal >= 7.0, < 7.102 cpe:2.3:a:drupal:drupal:*:*:*:*:*:*:*:*
drupal drupal >= 8.0.0, < 10.2.11 cpe:2.3:a:drupal:drupal:*:*:*:*:*:*:*:*
drupal drupal >= 10.3.0, < 10.3.9 cpe:2.3:a:drupal:drupal:*:*:*:*:*:*:*:*

References for CVE-2024-55638

URL Tags
https://www.drupal.org/sa-core-2024-008 Vendor Advisory
cvelogic Threat Intelligence