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CVE-2021-46871

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

Published: Jan 10, 2023Updated: Apr 9, 2025 Sources: CVE List NVD GHSACWE-79
NVD MITRE
6.1CVSSMEDIUM
EPSS Score
0.4%
Top 67.0%
CISA KEV
Not in KEV
Exploits
No Known Exploits
Remediation
Patch Available

Description

phoenix_html allows Cross-site Scripting in HEEx class attributes

CVSS Vector Breakdown

AV:NAC:LPR:NUI:RS:CC:LI:LA:N
Exploitability
AV:NAttack Vector
Network
AC:LAttack Complexity
Low
PR:NPrivileges Required
None
UI:RUser Interaction
Required
Scope
S:CScope
Changed
Impact
C:LConfidentiality
Low
I:LIntegrity
Low
A:NAvailability
None
Open in CVSS calculator →

Weaknesses

CWE-79

Affected Products

phoenix_htmlnpmOSS Libraries
phoenix_htmlHex
Library
OSS Libraries / hex
phoenix htmlphoenixframework
Library
OSS Libraries / web-framework
n/an/a
npmpackage-ecosystemOSS Libraries
hexpackage-ecosystemOSS Libraries
phoenixframeworkoss-projectOSS Librariesaka phoenix framework

Attack Graph

Products CVE Techniques Tactics

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Exploitability

Official Patch Available

MITRE ATT&CK

2 techniques
Execution
Initial Access
View detailed technique mapping

References

https://nvd.nist.gov/vuln/detail/CVE-2021-46871
nvd.nist.gov
https://github.com/phoenixframework/phoenix_html/commit/62a0139fb716bcdce697f6221244bd81d321d620
github.com
https://github.com/advisories/GHSA-j3gg-r6gp-95q2
github.com
and 1 more references View all →

Timeline

Published
Jan 10, 2023
Last Updated
Apr 9, 2025

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