CVE-2022-29273
Published: 22 February 2023
Summary
CVE-2022-29273 is a medium-severity Cross-site Scripting (CWE-79) vulnerability in Netgate Pfsense. Its CVSS base score is 6.1 (Medium).
Operationally, ranked in the top 7.0% of CVEs by exploit likelihood; it is not currently listed in the CISA KEV catalog.
Deeper analysis
pfSense CE through 2.6.0 and pfSense Plus before 22.05 contain a cross-site scripting flaw (CWE-79) in the WebGUI that is triggered through URL Table Alias URL parameters. The issue carries a CVSS 3.1 score of 6.1 reflecting network attack vector, low complexity, no required privileges, and required user interaction with changed scope.
An attacker can supply a crafted URL parameter that executes script in the context of an authenticated administrator who follows the link, resulting in limited confidentiality and integrity exposure within the WebGUI session.
Netgate security advisories such as pfSense-SA-22_05.webgui.asc and the associated release notes describe the affected releases and point to updated builds that resolve the input-handling weakness.
EPSS for the CVE rose from a low starting value to a peak of 0.4727 before receding to the current 0.0944, indicating a period of elevated exploitation interest after disclosure.
EU & UK References
- 🇪🇺 ENISA EUVD: EUVD-2022-33616
Vulnerability details
pfSense CE through 2.6.0 and pfSense Plus before 22.05 allow XSS in the WebGUI via URL Table Alias URL parameters.
- CWE(s)
Related Threats
No named actor attribution yet. ATT&CK technique mapping in progress for this CVE.
Affected Assets
Mitigating Controls
Likely Mitigating Controls AI
Per-CVE control mapping for this CVE has not run yet; the list below is derived from the weakness types (CWEs) cited in the NVD entry.
Penetration testing submits XSS payloads to web applications, detecting cross-site scripting flaws for subsequent remediation.
Validates web inputs to reject script-related content that could produce XSS.
Output validation against expected content can reject or sanitize script content in generated web pages, reducing XSS exploitability.