Deserialization in Mihche Wpbruiser {No- Captcha Anti-Spam}

CVE-2026-65556

Unauthenticated PHP Object Injection in WPBruiser {no- Captcha anti-Spam} <= 3.1.43 versions.

Vulnerability class: Insecure Deserialization

Published · last modified .

CVSS v3 metric

CVSS v3 base score 9.8 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.

EPSS exploit prediction

EPSS: 0.006 (46.9th percentile), scored .

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 47th percentile — 46.9% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS trend (30 days)EPSS over the last 30 days for CVE-2026-65556: held from 0.006 to 0.006.

EPSS over last 30 days · oldest: 0.006 · newest: 0.006 · change: 0.000

Affected products

Weakness classification (CWE)

References

Frequently asked questions

What is CVE-2026-65556?
CVE-2026-65556 is a critical-severity vulnerability in Mihche Wpbruiser {No- Captcha Anti-Spam}, classified under Deserialization of Untrusted Data. CVSS score: 9.8/10. Published 2026-08-06.
How severe is CVE-2026-65556?
Critical severity. CVSS v3 base score is 9.8 out of 10.