What is CVE-2021-23592?

CVE-2021-23592 is a high-severity vulnerability in Thinkphp, classified under Deserialization of Untrusted Data. CVSS score: 7.7/10. Published 2022-05-06.

How severe is CVE-2021-23592?

High severity. CVSS v3 base score is 7.7 out of 10.

Deserialization in Thinkphp

CVE-2021-23592

The package topthink/framework before 6.0.12 are vulnerable to Deserialization of Untrusted Data due to insecure unserialize method in the Driver class.

Vulnerability class: Insecure Deserialization

Published 2022-05-06 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 7.7 (High). Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:L.

EPSS exploit prediction

EPSS: 0.017 (76.7th percentile), scored 2026-09-30.

Low probability of exploitation in the next 30 days, but still tracked. 77th percentile — 76.7% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.017 · newest: 0.017 · change: +0.001

Affected products

Thinkphp
Topthink/framework — versions unspecified

Weakness classification (CWE)

CWE-502 — Deserialization of Untrusted Data

References

snyk.io/vuln/SNYK-PHP-TOPTHINKFRAMEWORK-2385695 (Third Party Advisory)
github.com/top-think/framework/releases/tag/v6.0.12 (Third Party Advisory)
github.com/top-think/framework/commit/d3b5aeae94bc71bae97977d05cd12c3e0550905c (Patch, Third Party Advisory)

Frequently asked questions

What is CVE-2021-23592?: CVE-2021-23592 is a high-severity vulnerability in Thinkphp, classified under Deserialization of Untrusted Data. CVSS score: 7.7/10. Published 2022-05-06.
How severe is CVE-2021-23592?: High severity. CVSS v3 base score is 7.7 out of 10.