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CVE-2021-26539

5.3 mediumEPSS 2.0%

Medium (5.3) in apostrophecms sanitize-html. EPSS 2.0% chance of exploitation in the next 30 days. Fixed in sanitize-html 2.3.1.

Apostrophe Technologies sanitize-html before 2.3.1 does not properly handle internationalized domain name (IDN) which could allow an attacker to bypass hostname whitelist validation set by the "allowedIframeHostnames" option.

Severity

CVSS 3.1

5.3 medium
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N
EPSS
2.0% chance of exploitation in the next 30 days; higher than 80% of CVEs (scores of 2026-10-31)
Published
Modified
Record from
the NVD, synced

Affected

Packages (OSV)

AdvisoryEcosystemPackageAffectedFixed in
GHSA-rjqq-98f6-6j3rnpmsanitize-html<2.3.12.3.1

References

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