What’s Vulnerable › Vulnerabilities

CVE-2020-37255: WordPress Time Capsule Plugin 1.21.16 Authentication Bypass

• Severity: high (CVSS 7.5 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.6% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-06-20 · updated 2026-09-29
• Weakness: CWE-288

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.

Affected products

• Wptimecapsule Time Capsule Plugin: through 1.21.16

References

• https://wptimecapsule.com/
• https://www.exploit-db.com/exploits/47941
• https://www.vulncheck.com/advisories/wordpress-time-capsule-plugin-authentication-bypass

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