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CVE-2021-26036— [20210702] - Core - DoS through usergroup table manipulation

Quick assessment

Affected
Joomla! Project Joomla! CMS
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Joomla 是美国Open Source Matters团队的一套使用PHP和MySQL开发的开源、跨平台的内容管理系统(CMS)。 Joomla! CMS 2.5.0 - 3.9.27存在输入验证错误漏洞，该漏洞源于对用户提供的输入验证不足。

AI Predicted 5.6 Difficulty: Easy EPSS 1.22% · P67

Possible ATT&CK Techniques 1 AI

T1190 · Exploit Public-Facing Application
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I. Basic Information for CVE-2021-26036

Vulnerability Information
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Vulnerability Title
[20210702] - Core - DoS through usergroup table manipulation
Source: CVE Program / CVE List V5
Vulnerability Description
An issue was discovered in Joomla! 2.5.0 through 3.9.27. Missing validation of input could lead to a broken usergroups table.
Source: CVE Program / CVE List V5
CVSS Information
N/A
Source: CVE Program / CVE List V5
Vulnerability Type
N/A
Source: CVE Program / CVE List V5
Vulnerability Title
Joomla! CMS 输入验证错误漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Joomla 是美国Open Source Matters团队的一套使用PHP和MySQL开发的开源、跨平台的内容管理系统(CMS)。 Joomla! CMS 2.5.0 - 3.9.27存在输入验证错误漏洞，该漏洞源于对用户提供的输入验证不足。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
Joomla! Project Joomla! CMS 2.5.0-3.9.27 -

II. Public POCs for CVE-2021-26036

# POC Description Source Link Shenlong Link
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III. Intelligence Information for CVE-2021-26036

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Other References for CVE-2021-26036 (1)

Same Patch Batch · Joomla! Project · 2021-07-07 · 5 CVEs total

CVE-2021-26035 [20210701] - Core - XSS in JForm Rules field
CVE-2021-26037 [20210703] - Core - Lack of enforced session termination
CVE-2021-26038 [20210704] - Core - Privilege escalation through com_installer
CVE-2021-26039 [20210705] - Core - XSS in com_media imagelist

IV. Related Vulnerabilities

Same product: Joomla! CMS
Same vendor: Joomla! Project

V. Comments for CVE-2021-26036

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