CVE-2021-26030: [20210401] - Core - Escape xss in logo parameter error pages

Severity: medium (CVSS 6.1 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 82.3% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2021-04-14 · updated 2026-06-17
Weakness: CWE-79

Description

An issue was discovered in Joomla! 3.0.0 through 3.9.25. Inadequate escaping allowed XSS attacks using the logo parameter of the default templates on error page

Affected products

Joomla!: from 3.0.0 through 3.9.25

References

https://developer.joomla.org/security-centre/850-20210401-core-escape-xss-in-logo-parameter-error-pages.html
https://developer.joomla.org/security-centre/850-20210401-core-escape-xss-in-logo-parameter-error-pages.html

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