What is CVE-2021-26030?

CVE-2021-26030 is a medium-severity vulnerability in Joomla Joomla\!, classified under Cross-site Scripting. CVSS score: 6.1/10. Published 2021-04-14.

How severe is CVE-2021-26030?

Medium severity. CVSS v3 base score is 6.1 out of 10.

XSS in Joomla Joomla\!

CVE-2021-26030

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

Vulnerability class: XSS (Cross-Site Scripting)

EPSS: 0.823 (99.6th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 6.1 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N.

Affected products

Joomla Joomla\!
Joomla! Project Cms — versions 3.0.0-3.9.25

Weakness classification (CWE)

CWE-79 — Cross-site Scripting

References

security@joomla.org (vendor-advisory, x_refsource_MISC, Vendor Advisory)

Frequently asked questions

What is CVE-2021-26030?: CVE-2021-26030 is a medium-severity vulnerability in Joomla Joomla\!, classified under Cross-site Scripting. CVSS score: 6.1/10. Published 2021-04-14.
How severe is CVE-2021-26030?: Medium severity. CVSS v3 base score is 6.1 out of 10.