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CVE-2021-26035— [20210701] - Core - XSS in JForm Rules field

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 3.0.0 到 3.9.27版本存在跨站脚本漏洞，该漏洞源于对 JForm API 的 Rules 字段转义不充分。

AI Predicted 6.1 Difficulty: Easy EPSS 0.72% · P51
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I. Basic Information for CVE-2021-26035

Vulnerability Information
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Vulnerability Title
[20210701] - Core - XSS in JForm Rules field
Source: CVE Program / CVE List V5
Vulnerability Description
An issue was discovered in Joomla! 3.0.0 through 3.9.27. Inadequate escaping in the rules field of the JForm API leads to a XSS vulnerability.
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! 跨站脚本漏洞
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 3.0.0 到 3.9.27版本存在跨站脚本漏洞，该漏洞源于对 JForm API 的 Rules 字段转义不充分。
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 3.0.0-3.9.27 -

II. Public POCs for CVE-2021-26035

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III. Intelligence Information for CVE-2021-26035

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Other References for CVE-2021-26035 (1)

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

CVE-2021-26036 [20210702] - Core - DoS through usergroup table manipulation
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-2021-26035

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