CVE-2020-37255

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.

CVSS v4.0

8.7 HIGHCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

CVSS v3.1

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

EPSS

0.63% chance of exploitation in the next 30 days, 48th percentile

Published

2026-06-20

Updated

2026-07-15

Proof-of-concept exploits (1)

• https://www.exploit-db.com/exploits/47941

References

• CVE Record
• NVD entry

Related

• CVE-2020-37254
• CVE-2020-37268
• CVE-2020-37253
• CVE-2020-3766
• CVE-2020-37252
• CVE-2020-3811