Vulnerability Name:

CVE-2021-20729 (CCN-221842)

Assigned:2020-12-17
Published:2022-03-15
Updated:2022-04-08
Summary: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 v3 Severity:6.1 Medium (CVSS v3.1 Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N)
5.3 Medium (Temporal CVSS v3.1 Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N/E:U/RL:O/RC:C)
Exploitability Metrics:Attack Vector (AV): Network
Attack Complexity (AC): Low
Privileges Required (PR): None
User Interaction (UI): Required
Scope:Scope (S): Changed
Impact Metrics:Confidentiality (C): Low
Integrity (I): Low
Availibility (A): None
6.1 Medium (CCN CVSS v3.1 Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N)
5.3 Medium (CCN Temporal CVSS v3.1 Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N/E:U/RL:O/RC:C)
Exploitability Metrics:Attack Vector (AV): Network
Attack Complexity (AC): Low
Privileges Required (PR): None
User Interaction (UI): Required
Scope:Scope (S): Changed
Impact Metrics:Confidentiality (C): Low
Integrity (I): Low
Availibility (A): None
CVSS v2 Severity:4.3 Medium (CVSS v2 Vector: AV:N/AC:M/Au:N/C:N/I:P/A:N)
Exploitability Metrics:Access Vector (AV): Network
Access Complexity (AC): Medium
Authentication (Au): None
Impact Metrics:Confidentiality (C): None
Integrity (I): Partial
Availibility (A): None
5.5 Medium (CCN CVSS v2 Vector: AV:N/AC:L/Au:S/C:P/I:P/A:N)
Exploitability Metrics:Access Vector (AV): Network
Access Complexity (AC): Low
Athentication (Au): Single_Instance
Impact Metrics:Confidentiality (C): Partial
Integrity (I): Partial
Availibility (A): None
Vulnerability Type:CWE-79
Vulnerability Consequences:Cross-Site Scripting
References:Source: MITRE
Type: CNA
CVE-2021-20729

Source: CCN
Type: JVN#87751554
Multiple vulnerabilities in pfSense

Source: MISC
Type: Third Party Advisory
https://docs.netgate.com/downloads/pfSense-SA-21_02.captiveportal.asc

Source: XF
Type: UNKNOWN
pfsense-cve202120729-xss(221842)

Source: MISC
Type: Third Party Advisory, VDB Entry
https://jvn.jp/en/jp/JVN87751554/index.html

Source: CCN
Type: Netgate Web site
Netgate

Vulnerable Configuration:Configuration 1:
  • cpe:/a:netgate:pfsense_plus:*:*:*:*:*:*:*:* (Version <= 21.05)
  • OR cpe:/a:pfsense:pfsense:*:*:*:*:community:*:*:* (Version <= 2.5.2)

  • * Denotes that component is vulnerable
    BACK
    netgate pfsense plus *
    pfsense pfsense *