WordPress Time Capsule Plugin 1.21.16 contains an authentication bypass vulnerability that allows unauthenticated attackers to gain administrative access by sending a crafted POST request with the IWP_JSON_PREFIX header. Attackers can exploit this flaw to obtain valid administrator session cookies and access the WordPress dashboard without providing credentials.
History

Wed, 24 Jun 2026 20:30:00 +0000

Type Values Removed Values Added
First Time appeared Wordpress
Wordpress wordpress
Wptimecapsule
Wptimecapsule wp Time Capsule
Vendors & Products Wordpress
Wordpress wordpress
Wptimecapsule
Wptimecapsule wp Time Capsule

Tue, 23 Jun 2026 03:30:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'yes', 'Exploitation': 'poc', 'Technical Impact': 'partial'}, 'version': '2.0.3'}


Sat, 20 Jun 2026 14:00:00 +0000

Type Values Removed Values Added
Description WordPress Time Capsule Plugin 1.21.16 contains an authentication bypass vulnerability that allows unauthenticated attackers to gain administrative access by sending a crafted POST request with the IWP_JSON_PREFIX header. Attackers can exploit this flaw to obtain valid administrator session cookies and access the WordPress dashboard without providing credentials.
Title WordPress Time Capsule Plugin 1.21.16 Authentication Bypass
Weaknesses CWE-288
References
Metrics cvssV3_1

{'score': 7.5, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N'}

cvssV4_0

{'score': 8.7, 'vector': 'CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N'}


cve-icon MITRE

Status: PUBLISHED

Assigner: VulnCheck

Published: 2026-06-20T13:36:53.086Z

Updated: 2026-06-23T02:29:30.425Z

Reserved: 2026-06-20T13:28:50.581Z

Link: CVE-2020-37255

cve-icon Vulnrichment

Updated: 2026-06-23T02:29:25.605Z

cve-icon NVD

No data.

cve-icon Redhat

No data.