What’s Vulnerable › Vulnerabilities

CVE-2021-23124: [20210102] - Core - XSS in mod_breadcrumbs aria-label attribute

• Severity: medium (CVSS 6.1 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 79.0% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2021-01-12 · updated 2026-06-17
• Weakness: CWE-79

Description

An issue was discovered in Joomla! 3.9.0 through 3.9.23. The lack of escaping in mod_breadcrumbs aria-label attribute allows XSS attacks.

Affected products

• Joomla!: from 3.9.0 through 3.9.23

References

• https://developer.joomla.org/security-centre/837-20210102-core-xss-in-mod-breadcrumbs-aria-label-attribute.html
• https://developer.joomla.org/security-centre/837-20210102-core-xss-in-mod-breadcrumbs-aria-label-attribute.html

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