QID 34080

Date Published: 2022-05-26

QID 34080: pfSense Cross Site Scripting Vulnerability (XSS) (PFSENSE-SA-21_02)

pfSense is an open-source firewall/router which based on FreeBSD. pfsense can be deployed as a perimeter firewall, router, wireless access point, DHCP server, DNS server and VPN endpoint.

pfSense is prone to a cross-site scripting vulnerability.

Affected versions:
pfsense versions prior to 2.5.2

If a logged-in captive portal user visits a manually crafted URL for the Captive Portal login page which contains a malicious value for redirurl, and then follows the resulting link, it could lead to arbitrary JavaScript code being executed in their browser. This is possible due to the lack of proper encoding on the affected parameters susceptible to XSS. The user's session cookie or other information from the session may be compromised.

  • CVSS V3 rated as High - 6.1 severity.
  • CVSS V2 rated as Medium - 4.3 severity.
    • Solution
    Customers are advised to install Pfsense 2.5.2 or later versions to remediate this vulnerabilities.
    Vendor References

    CVEs related to QID 34080

    CVE-2021-20729 |
    Software Advisories
    Advisory ID Software Component Link
    pfSense-SA-21_02 URL Logo docs.netgate.com/downloads/pfSense-SA-21_02.captiveportal.asc
    By selecting these links, you may be leaving CVEreport webspace. We have provided these links to other websites because they may have information that would be of interest to you. No inferences should be drawn on account of other sites being referenced, or not, from this page. There may be other websites that are more appropriate for your purpose. CVEreport does not necessarily endorse the views expressed, or concur with the facts presented on these sites. Further, CVEreport does not endorse any commercial products that may be mentioned on these sites. Please address comments about any linked pages to [email protected].