CVE-2022-4120

Stop Spammers Security < 2022.6 - Unauthenticated PHP Object Injection

The Stop Spammers Security | Block Spam Users, Comments, Forms WordPress plugin before 2022.6 passes base64 encoded user input to the unserialize() PHP function when CAPTCHA are used as second challenge, which could lead to PHP Object injection if a plugin installed on the blog has a suitable gadget chain

Affected

Stop Spammers Security | Block Spam Users, Comments, Forms

CVSS v3.1 NVD

9.8 CRITICALCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

EPSS

18.12% chance of exploitation in the next 30 days, 97th percentile

Published

2022-12-26

Updated

2025-04-14

Proof-of-concept exploits (1)

• https://wpscan.com/vulnerability/e8bb79db-ef77-43be-b449-4c4b5310eedf

References

• CVE Record
• NVD entry