Is CVE-2022-4120 actively exploited?

No active exploitation of CVE-2022-4120 has been confirmed so far. Continue monitoring, as exploit status can change.

Can CVE-2022-4120 be exploited remotely?

Yes. CVE-2022-4120 is exploitable remotely over the network (CVSS attack vector: Network).

What is the CVSS score of CVE-2022-4120?

CVE-2022-4120 has a CVSS score of 9.8 (CRITICAL).

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CRITICAL

CVE-2022-4120

Published: December 26, 2022· Updated: Jun 17, 2026

9.8

CVSS v3.1

Official Description

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

NVD Source

Risk Analysis

The Stop Spammers Security plugin is vulnerable to PHP Object injection because it insecurely processes user input. With a CVSS score of 9.8, this flaw allows remote, unauthenticated attackers to achieve full system compromise.

There is no known public exploit for this vulnerability, and it is not currently listed in CISA's KEV catalog. It is remotely exploitable due to its network attack vector and low complexity.

Recommended Action

Update the Stop Spammers Security plugin to version 2022.6 or later to resolve the insecure unserialization.

Generated by the CTIWATCH analysis pipeline from this CVE's metadata (CVSS, EPSS, KEV status, exploit intelligence). Verify against vendor advisories before acting.

Technical Analysis

CVE-2022-4120 can be exploited remotely over the network without requiring physical or adjacent access, significantly expanding the attack surface for threat actors.

The vulnerability requires no privileges and no user interaction, making it a prime target for automated exploitation campaigns and worm-like propagation.

A successful exploit results in complete confidentiality breach (data exposure), full integrity compromise (data manipulation), availability disruption (denial of service), with a CVSS base score of 9.8.