CVE-2023-42327
Published: 14 November 2023
Summary
CVE-2023-42327 is a medium-severity Cross-site Scripting (CWE-79) vulnerability in Netgate Pfsense. Its CVSS base score is 5.4 (Medium).
Operationally, ranked in the top 2.2% of CVEs by exploit likelihood; it is not currently listed in the CISA KEV catalog; a public proof-of-concept is referenced.
Deeper analysis
CVE-2023-42327 is a cross-site scripting vulnerability affecting the web GUI component of Netgate pfSense version 2.7.0. The flaw resides in the getserviceproviders.php page and is classified under CWE-79, with a CVSS 3.1 score of 5.4 reflecting network attack vector, low attack complexity, low required privileges, and required user interaction.
An authenticated remote attacker with low privileges can exploit the issue by supplying a crafted URL that triggers script execution in the context of another user session, enabling privilege escalation within the pfSense administrative interface.
Netgate has published advisory pfSense-SA-23_08.webgui.asc addressing the web GUI issue, while independent analysis from SonarSource provides additional technical details on the affected code paths.
The associated EPSS score stands at 0.4831 with no material change from its recorded peak, indicating sustained but not newly emerging exploitation interest after disclosure.
EU & UK References
- 🇪🇺 ENISA EUVD: EUVD-2023-46780
Vulnerability details
Cross Site Scripting (XSS) vulnerability in Netgate pfSense v.2.7.0 allows a remote attacker to gain privileges via a crafted URL to the getserviceproviders.php page.
- 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.