CVE-2020-23653

Name: CVE-2020-23653
Creator: NVD / NIST
Published: 2021-01-13T18:15:14.04+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

CRITICALCVSS 9.8/10EPSS 4.10%

Last modified Jun 17, 2026

CVE-2020-23653 is a critical-severity vulnerability rated 9.8/10 on the CVSS scale. An insecure unserialize vulnerability was discovered in ThinkAdmin versions 4.x through 6.x in app/admin/controller/api/Update.php and app/wechat/controller/api/Push.php, which may lead to arbitrary remote code execution.. EPSS estimates a 4.10% chance of exploitation in the next 30 days.

Description

An insecure unserialize vulnerability was discovered in ThinkAdmin versions 4.x through 6.x in app/admin/controller/api/Update.php and app/wechat/controller/api/Push.php, which may lead to arbitrary remote code execution.

Metrics

CVSS 3.1

9.8/10

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

EPSS Probability

4.10%

89.5th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-502

Affected Software

Vendor	Product	Versions
Thinkadmin	Thinkadmin	>= 4.0, <= 6.0

References

https://github.com/zoujingli/ThinkAdmin/issues/238Exploit, Third Party Advisory
https://github.com/zoujingli/ThinkAdmin/issues/238Exploit, Third Party Advisory

Timeline

Published: Jan 13, 2021
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2020-23653?

How severe is CVE-2020-23653?

CVE-2020-23653 has a CVSS score of 9.8/10 (CRITICAL severity). The EPSS model estimates a 4.10% probability of exploitation in the next 30 days.

How do I fix CVE-2020-23653?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2020-23653?

Run a free Strix scan to check your systems for this vulnerability.

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Source: NVD / NIST