CVE-2021-46871

6.1 mediumEPSS 0.4%

Medium (6.1) in phoenixframework phoenix html. EPSS 0.4% chance of exploitation in the next 30 days. Fixed in phoenix_html 3.0.4.

tag.ex in Phoenix Phoenix.HTML (aka phoenix_html) before 3.0.4 allows XSS in HEEx class attributes.

Severity

6.1 medium

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N

EPSS: 0.4% chance of exploitation in the next 30 days; higher than 37% of CVEs (scores of 2026-10-31)
CWE: CWE-79
Published: 2023-01-10
Modified: 2026-06-17
Record from: the NVD, synced 2026-10-19

Advisory	Ecosystem	Package	Affected	Fixed in
GHSA-5g2h-9x5v-5h3x	npm	phoenix_html	<3.0.4	3.0.4
GHSA-5g2h-9x5v-5h3x	Hex	phoenix_html	<3.0.4	3.0.4