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CVE-2025-4644: User Session Fixation after Account Removal in PayloadCMS

• Severity: medium (CVSS 5.3 v4.0)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.4% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2025-08-29 · updated 2026-10-19
• Weakness: CWE-384

Description

A Session Fixation vulnerability existed in Payload's SQLite adapter due to identifier reuse during account creation. A malicious attacker could create a new account, save its JSON Web Token (JWT), and then delete the account, which did not invalidate the JWT. As a result, the next newly created user would receive the same identifier, allowing the attacker to reuse the JWT to authenticate and perform actions as that user. This issue has been fixed in version 3.44.0 of Payload.

Affected products

• Payload CMS Payload: before 3.44.0 — fixed in 3.44.0

How to fix

Upgrade to a fixed version: Payload CMS Payload 3.44.0. Check the vendor advisory for mitigations.

References

• https://cert.pl/en/posts/2025/08/CVE-2025-4643
• https://github.com/payloadcms/payload
• https://payloadcms.com

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