CVE-2023-45727 — North Grid Proself Improper Restriction of XML External Entity (XXE) Reference Vulnerability

Overview

North Grid Proself Enterprise/Standard, Gateway, and Mail Sanitize contain an improper restriction of XML External Entity (XXE) reference vulnerability, which could allow a remote, unauthenticated attacker to conduct an XXE attack.

Vulnerability details

CVE ID

CVE-2023-45727

Vulnerability

North Grid Proself Improper Restriction of XML External Entity (XXE) Reference Vulnerability

Vendor

North Grid

Affected products

North Grid: Proself

Severity

HIGH

Exploitation status

Actively exploited in the wild (CISA KEV)

Published

2024-12-03

Remediation guidance

CVE-2023-45727 is in CISA's Known Exploited Vulnerabilities (KEV) catalog — U.S. federal civilian agencies are required to remediate it under Binding Operational Directive 22-01. Treat it as a priority for every environment.

Apply the vendor's official security update for North Grid the affected product as soon as possible. Where a patch is unavailable, apply vendor mitigations or isolate/segment exposed systems.

Hunt for indicators of compromise tied to this vulnerability and confirm logging/EDR coverage on affected assets.

Authoritative references

• NVD — National Vulnerability Database
• MITRE CVE Record
• CISA Known Exploited Vulnerabilities Catalog
• FIRST EPSS — Exploit Prediction Scoring