Deserialization in Clearfy Cache

CVE-2026-16297

The Clearfy Cache WordPress plugin before 2.4.3 does not restrict the classes allowed when unserializing settings-import data, allowing users with administrator access to perform PHP Object Injection attacks, which may lead to remote code execution when a suitable gadget chain is present in the environment.

Vulnerability class: Insecure Deserialization

Published · last modified .

CVSS v3 metric

CVSS v3 base score 4.1 (Medium). Vector: CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:U/C:L/I:L/A:L.

EPSS exploit prediction

EPSS: 0.004 (30.6th percentile), scored .

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 31st percentile — 30.6% 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-2026-16297: held from 0.004 to 0.004.

EPSS over last 30 days · oldest: 0.004 · newest: 0.004 · change: 0.000

Affected products

  • Clearfy Cache — versions 0

Weakness classification (CWE)

References

Frequently asked questions

What is CVE-2026-16297?
CVE-2026-16297 is a medium-severity vulnerability in Clearfy Cache, classified under Deserialization of Untrusted Data. CVSS score: 4.1/10. Published 2026-08-03.
How severe is CVE-2026-16297?
Medium severity. CVSS v3 base score is 4.1 out of 10.