CVE-2021-41258: Cross-site scripting (XSS) from image block content in the site frontend

medium Affects getkirby/cms. Feed 2026.10.29.4, updated 2026-10-29; published ; advisory modified .

Cross-site scripting (XSS) from image block content in the site frontend

Package
getkirby/cms Composer
Affected versions
>=3.5.0 and <3.5.8
Fixed in
3.5.8
Severity
medium  CVSS 5.4
Exploitation
not on CISA KEV · EPSS 1% (56.7th percentile)
Published
2021-11-16
Source
osv.dev

References

CWE-79CWE-80
NVD recordgetkirby/cms advisories

Am I affected?

Find out in one command. phpwarden checks your composer.lock against this advisory and 20,000+ others, ranked by real-world exploitation (CISA KEV + EPSS). Free, offline, open data.

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