What is CVE-2022-27158?

CVE-2022-27158 is a critical-severity vulnerability in PHP Pearweb, classified under Deserialization of Untrusted Data. CVSS score: 9.8/10. Published 2022-04-15.

How severe is CVE-2022-27158?

Critical severity. CVSS v3 base score is 9.8 out of 10.

Deserialization in PHP Pearweb

CVE-2022-27158

pearweb < 1.32 suffers from Deserialization of Untrusted Data.

Vulnerability class: Insecure Deserialization

Published 2022-04-15 · last modified 2026-06-17.

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: 0.013 (69.0th percentile), scored 2026-09-29.

Low probability of exploitation in the next 30 days, but still tracked. 69th percentile — 69.0% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.013 · newest: 0.013 · change: +0.000

Affected products

PHP Pearweb

Weakness classification (CWE)

CWE-502 — Deserialization of Untrusted Data

References

github.com/pear/pearweb/commit/6447c174a6b4bd76d28ecca8543cbd24bf394f99 (Patch, Third Party Advisory)

Frequently asked questions

What is CVE-2022-27158?: CVE-2022-27158 is a critical-severity vulnerability in PHP Pearweb, classified under Deserialization of Untrusted Data. CVSS score: 9.8/10. Published 2022-04-15.
How severe is CVE-2022-27158?: Critical severity. CVSS v3 base score is 9.8 out of 10.