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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.

PUBLISHED Reserved 2026-06-20 | Published 2026-06-20 | Updated 2026-06-21 | Assigner VulnCheck




HIGH: 8.7CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N

HIGH: 7.5CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

Problem types

Authentication Bypass Using an Alternate Path or Channel

Product status

Default status
unaffected

Any version
affected

Credits

B. Canavate finder

References

www.exploit-db.com/exploits/47941 (ExploitDB-47941) exploit

wptimecapsule.com/ (Official Product Homepage) product

www.vulncheck.com/...me-capsule-plugin-authentication-bypass (VulnCheck Advisory: WordPress Time Capsule Plugin 1.21.16 Authentication Bypass) third-party-advisory

cve.org (CVE-2020-37255)

nvd.nist.gov (CVE-2020-37255)

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