CVE-2020-11457 : pfSense before 2.4.5 has stored XSS in system_usermanager

pfSense before 2.4.5 has stored XSS in system_usermanager_addprivs.php in the WebGUI via the descr parameter (aka full name) of a user.

Published 2020-04-01 16:15:28

Updated 2020-04-06 21:15:13

Source MITRE

View at NVD, CVE.org

Vulnerability category: Cross site scripting (XSS)

Products affected by CVE-2020-11457

Netgate » Pfsense
Versions before (<) 2.4.5
cpe:2.3:a:netgate:pfsense:*:*:*:*:*:*:*:*
Matching versions

EPSS FAQ

0.41%

Probability of exploitation activity in the next 30 days EPSS Score History

~ 75 %

Percentile, the proportion of vulnerabilities that are scored at or less

Base Score	Base Severity	CVSS Vector	Exploitability Score	Impact Score	Score Source
3.5	LOW	AV:N/AC:M/Au:S/C:N/I:P/A:N	6.8	2.9	NIST
Access Vector: Network Access Complexity: Medium Authentication: Single Confidentiality Impact: None Integrity Impact: Partial Availability Impact: None
5.4	MEDIUM	CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N	2.3	2.7	NIST
Attack Vector: Network Attack Complexity: Low Privileges Required: Low User Interaction: Required Scope: Changed Confidentiality: Low Integrity: Low Availability: None

CWE-79 Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')

The product does not neutralize or incorrectly neutralizes user-controllable input before it is placed in output that is used as a web page that is served to other users.

Assigned by: nvd@nist.gov (Primary)

http://packetstormsecurity.com/files/157104/pfSense-2.4.4-P3-User-Manager-Cross-Site-Scripting.html

pfSense 2.4.4-P3 User Manager Cross Site Scripting ≈ Packet Storm
https://github.com/pfsense/pfsense/commit/3c1e53dabe966f27c9097a5a923e77f49ae5fffa

Encode user descr before output. Fixes #103241 · pfsense/pfsense@3c1e53d · GitHub
Patch;Third Party Advisory
https://www.exploit-db.com/exploits/48300

pfSense 2.4.4-P3 - 'User Manager' Persistent Cross-Site Scripting - FreeBSD webapps Exploit
https://www.netgate.com/assets/downloads/advisories/pfSense-SA-20_06.webgui.asc

Patch;Vendor Advisory

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