Medium severity · published Mar 31, 2022
CVE-2021-20729
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…
6.1
CVSS
2.9%
EPSS
No
On KEV
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.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
Required
Confidentiality
Low
Integrity
Low
Availability
None
Scope
Changed
Exploitation
Is it being used?
Exploit prediction (EPSS)2.9% · higher than 87% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
PF
Pfsense · Pfsense
through 2.5.2 · source: NVD
PP
Pfsense Plus · Netgate
through 21.05 · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2021-20729
CVE.org
https://www.cve.org/CVERecord?id=CVE-2021-20729
Third Party Advisory
https://docs.netgate.com/downloads/pfSense-SA-21_02.captiveportal.asc
Third Party Advisory
https://jvn.jp/en/jp/JVN87751554/index.html
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