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Vulnerability record · CVE-2020-23653 · published 13 January 2021

CVE-2020-23653: Thinkadmin deserialization of untrusted data vulnerability

Thinkadmin · Thinkadmin

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.

9.8 CVSS 3.1 Critical EPSS 4.1% · top 9.6% CWE-502 · Deserialization of untrusted data
9.8CVSS 3.1 base score, v2 7.5
4.1%EPSS exploitation probability, 30 days
NoNot in CISA KEV
1Affected product versions listed by NVD
2References, 2 tagged exploit
17 Jun 2026Last modified by NVD

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.

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

Affected products

1 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
https://github.com/zoujingli/ThinkAdmin/issues/238 ExploitThird Party Advisory
https://github.com/zoujingli/ThinkAdmin/issues/238 ExploitThird Party Advisory

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Related vulnerabilities

Same products first, then exploited flaws of the same weakness class.

9.8CVE-2019-11018Thinkadmin improper authentication vulnerabilityapplication\admin\controller\User.php in ThinkAdmin V4.0 does not prevent continued use of an administrator's cookie-based credentials after a passwo…EPSS 1.4%8.8CVE-2023-48965Thinkadmin unrestricted file upload vulnerabilityAn issue in the component /admin/api.plugs/script of ThinkAdmin v6.1.53 allows attackers to getshell via providing a crafted URL to download a malici…EPSS 0.90%8.8CVE-2023-48966Thinkadmin unrestricted file upload vulnerabilityAn arbitrary file upload vulnerability in the component /admin/api.upload/file of ThinkAdmin v6.1.53 allows attackers to execute arbitrary code via a…EPSS 1.1%7.5CVE-2020-35296Thinkadmin hard-coded credentials vulnerabilityThinkAdmin v6 has default administrator credentials, which allows attackers to gain unrestricted administratior dashboard access.EPSS 2.2%7.5CVE-2020-25540ThinkAdmin v6 directory traversal allows arbitrary file readThinkAdmin v6 contains a directory traversal flaw (CWE-22) reachable through a GET request's encode parameter. An unauthenticated attacker can read a…EPSS 75%analysed6.1CVE-2023-34833Thinkadmin unrestricted file upload vulnerabilityAn arbitrary file upload vulnerability in the component /api/upload.php of ThinkAdmin v6 allows attackers to execute arbitrary code via a crafted fil…EPSS 0.54%5.4CVE-2020-29315Thinkadmin cross-site scripting vulnerabilityThinkAdmin version v1 v6 has a stored XSS vulnerability which allows remote attackers to inject an arbitrary web script or HTML.EPSS 1.0%2.3CVE-2024-10749Thinkadmin deserialization of untrusted data vulnerabilityA vulnerability, which was classified as critical, was found in ThinkAdmin up to 6.1.67. Affected is the function script of the file /app/admin/contr…EPSS 0.53%

Source: NIST National Vulnerability Database (record CVE-2020-23653), CISA KEV, FIRST EPSS (scores of 2026-09-27). This page is refreshed as NVD updates the record.