CVE-2021-20729

MediumCVSS 6.1/10Last modified Jun 17, 2026

Description

Cross-site scripting vulnerability in pfSense CE and pfSense Plus (pfSense CE software versions 2.5.2 and earlier, and pfSense Plus software versions 21.05 and earlier) allows a remote attacker to inject an arbitrary script via a malicious URL.

Metrics

CVSS 3.1 6.1/10CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N

Weakness enumeration

CWE-79

Affected software

Vendor	Product	Versions
pfSense	pfSense CE and pfSense Plus	pfSense CE software versions 2.5.2 and earlier, and pfSense Plus software versions 21.05 and earlier

References

https://docs.netgate.com/downloads/pfSense-SA-21_02.captiveportal.ascThird Party Advisory
https://jvn.jp/en/jp/JVN87751554/index.htmlThird Party Advisory, VDB Entry
https://docs.netgate.com/downloads/pfSense-SA-21_02.captiveportal.ascThird Party Advisory
https://jvn.jp/en/jp/JVN87751554/index.htmlThird Party Advisory, VDB Entry

Timeline

Published: Mar 31, 2022
Last modified: Jun 17, 2026
NVD status: Modified

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