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Vulnerability details: VCID-vevm-4sfk-f7gq
Vulnerability ID VCID-vevm-4sfk-f7gq
Aliases CVE-2024-55634
GHSA-7cwc-fjqm-8vh8
Summary Drupal core Access bypass Drupal's uniqueness checking for certain user fields is inconsistent depending on the database engine and its collation. As a result, a user may be able to register with the same email address as another user. This may lead to data integrity issues. This issue affects Drupal Core: from 8.0.0 before 10.2.11, from 10.3.0 before 10.3.9, from 11.0.0 before 11.0.8.
Status Published
Exploitability 0.5
Weighted Severity 6.2
Risk 3.1
Affected and Fixed Packages Package Details
Weaknesses (4)
CWE-178 Improper Handling of Case Sensitivity
CWE-289 Authentication Bypass by Alternate Name
CWE-937 OWASP Top Ten 2013 Category A9 - Using Components with Known Vulnerabilities
CWE-1035 OWASP Top Ten 2017 Category A9 - Using Components with Known Vulnerabilities
System Score Found at
epss 0.00848 https://api.first.org/data/v1/epss?cve=CVE-2024-55634
epss 0.00848 https://api.first.org/data/v1/epss?cve=CVE-2024-55634
epss 0.00848 https://api.first.org/data/v1/epss?cve=CVE-2024-55634
epss 0.00848 https://api.first.org/data/v1/epss?cve=CVE-2024-55634
epss 0.00848 https://api.first.org/data/v1/epss?cve=CVE-2024-55634
epss 0.00848 https://api.first.org/data/v1/epss?cve=CVE-2024-55634
epss 0.00848 https://api.first.org/data/v1/epss?cve=CVE-2024-55634
epss 0.00848 https://api.first.org/data/v1/epss?cve=CVE-2024-55634
cvssv3.1_qr MODERATE https://github.com/advisories/GHSA-7cwc-fjqm-8vh8
cvssv4 6.9 https://github.com/drupal/core
generic_textual MODERATE https://github.com/drupal/core
cvssv4 6.9 https://github.com/drupal/core/commit/7ae0e8f1824e15f8b2b06e4da09836250e85e934
generic_textual MODERATE https://github.com/drupal/core/commit/7ae0e8f1824e15f8b2b06e4da09836250e85e934
cvssv4 6.9 https://nvd.nist.gov/vuln/detail/CVE-2024-55634
generic_textual MODERATE https://nvd.nist.gov/vuln/detail/CVE-2024-55634
cvssv3.1 8.1 https://www.drupal.org/sa-core-2024-004
cvssv4 6.9 https://www.drupal.org/sa-core-2024-004
generic_textual MODERATE https://www.drupal.org/sa-core-2024-004
ssvc Track https://www.drupal.org/sa-core-2024-004
Reference id Reference type URL
https://api.first.org/data/v1/epss?cve=CVE-2024-55634
https://github.com/drupal/core
https://github.com/drupal/core/commit/7ae0e8f1824e15f8b2b06e4da09836250e85e934
https://nvd.nist.gov/vuln/detail/CVE-2024-55634
https://www.drupal.org/sa-core-2024-004
GHSA-7cwc-fjqm-8vh8 https://github.com/advisories/GHSA-7cwc-fjqm-8vh8
No exploits are available.
Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N Found at https://github.com/drupal/core
Attack Vector (AV) Attack Complexity (AC) Attack Requirements (AT) Privileges Required (PR) User Interaction (UI) Vulnerable System Impact Confidentiality (VC) Vulnerable System Impact Integrity (VI) Vulnerable System Impact Availability (VA) Subsequent System Impact Confidentiality (SC) Subsequent System Impact Integrity (SI) Subsequent System Impact Availability (SA)

network

adjacent

local

physical

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passive

active

high

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Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N Found at https://github.com/drupal/core/commit/7ae0e8f1824e15f8b2b06e4da09836250e85e934
Attack Vector (AV) Attack Complexity (AC) Attack Requirements (AT) Privileges Required (PR) User Interaction (UI) Vulnerable System Impact Confidentiality (VC) Vulnerable System Impact Integrity (VI) Vulnerable System Impact Availability (VA) Subsequent System Impact Confidentiality (SC) Subsequent System Impact Integrity (SI) Subsequent System Impact Availability (SA)

network

adjacent

local

physical

low

high

none

present

none

low

high

none

passive

active

high

low

none

high

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high

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Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N Found at https://nvd.nist.gov/vuln/detail/CVE-2024-55634
Attack Vector (AV) Attack Complexity (AC) Attack Requirements (AT) Privileges Required (PR) User Interaction (UI) Vulnerable System Impact Confidentiality (VC) Vulnerable System Impact Integrity (VI) Vulnerable System Impact Availability (VA) Subsequent System Impact Confidentiality (SC) Subsequent System Impact Integrity (SI) Subsequent System Impact Availability (SA)

network

adjacent

local

physical

low

high

none

present

none

low

high

none

passive

active

high

low

none

high

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none

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Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N Found at https://www.drupal.org/sa-core-2024-004
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

network

adjacent_network

local

physical

low

high

none

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high

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required

unchanged

changed

high

low

none

high

low

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low

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Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N Found at https://www.drupal.org/sa-core-2024-004
Attack Vector (AV) Attack Complexity (AC) Attack Requirements (AT) Privileges Required (PR) User Interaction (UI) Vulnerable System Impact Confidentiality (VC) Vulnerable System Impact Integrity (VI) Vulnerable System Impact Availability (VA) Subsequent System Impact Confidentiality (SC) Subsequent System Impact Integrity (SI) Subsequent System Impact Availability (SA)

network

adjacent

local

physical

low

high

none

present

none

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none

passive

active

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low

none

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Vector: SSVCv2/E:N/A:N/T:T/P:M/B:A/M:M/D:T/2024-12-11T16:38:29Z/ Found at https://www.drupal.org/sa-core-2024-004
Exploit Prediction Scoring System (EPSS)
Percentile 0.74805
EPSS Score 0.00848
Published At April 2, 2026, 12:55 p.m.
Date Actor Action Source VulnerableCode Version
2026-04-01T12:50:14.174614+00:00 GithubOSV Importer Import https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2024/12/GHSA-7cwc-fjqm-8vh8/GHSA-7cwc-fjqm-8vh8.json 38.0.0