The JAY Login & Register plugin for WordPress is vulnerable to authentication bypass in versions up to, and including, 2.4.01. This is due to incorrect authentication checking in the 'jay_login_register_process_switch_back' function with the 'jay_login_register_process_switch_back' cookie value. This makes it possible for unauthenticated attackers to log in as any existing user on the site, such as an administrator, if they have access to the user id.
CVE-2025-14440
Score 9.8 from GitHub Security Advisory (severity: CRITICAL) published 2025-12-13. NVD baseline CVSS 9.8; sources differ by 0.0.
- High severity, but no confirmed exploitation yet
No vendor fix yet — apply a workaround or compensating control (WAF / firewall / segmentation) and watch for a patch.
- CVSS v3
- 9.8
- EG Score
- 9.8(medium)
- EPSS
- 49.5%
- KEV
- Not listed
Published
December 13, 2025
Last Modified
April 15, 2026
References (3)
- security@wordfencehttps://plugins.trac.wordpress.org/browser/jay-login-register/tags/2.4.01/includes/jay-login-register-user-switching.php#L98
- security@wordfencehttps://plugins.trac.wordpress.org/changeset/3418754/
- security@wordfencehttps://www.wordfence.com/threat-intel/vulnerabilities/id/928877a6-eeeb-4ed5-900b-9b1560e1bf87?source=cve
Weakness Classification(1)
MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.
Data Freshness Timeline
(refreshed 10× in last 7d / 42× in last 30d)
Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. Most recent first.
Showing the most recent 100 of 117 total refreshes for this CVE.
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Publicly available exploits
(1 reference)Working exploit code is in the public domain (1 GitHub PoC). Defenders should treat patch urgency accordingly — public PoCs typically lead to mass-exploitation within 24-72 hours.
- GitHub PoCNxploited/CVE-2025-14440First seen Dec 18, 2025
JAY Login & Register <= 2.4.01 - Authentication Bypass via Cookie
Open source ↗
Related CVEs(same CWE)
Same CWE
10 shownCWE-565
- CVE-2023-45128NVD 8.8EG 10.0HIGH
- CVE-2023-41084NVD 9.8EG 10.0CRITICAL
- CVE-2026-39324EG 9.8CRITICAL
- CVE-2014-125112EG 9.8CRITICAL
- CVE-2022-50926EG 9.8CRITICAL
- CVE-2025-65212EG 9.8EPSS 91%CRITICAL
- CVE-2025-2395EG 9.8CRITICAL
- CVE-2024-0947EG 9.8CRITICAL
- CVE-2024-28288EG 9.8CRITICAL
- CVE-2023-35885EG 9.8EPSS 99%CRITICAL
Frequently asked(5)
What is CVE-2025-14440?
When was CVE-2025-14440 disclosed?
Is CVE-2025-14440 actively exploited?
What is the CVSS score of CVE-2025-14440?
How do I remediate CVE-2025-14440?
Dependency Blast Radius
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