CVE-2023-45727
Published 2023-10-18 · Updated 2026-06-17 · Source vultures@jpcert.or.jp
Summary
CVE-2023-45727 is a high-severity (CVSS 7.5) vulnerability in North Grid Proself. CISA added it to the Known Exploited Vulnerabilities catalog on December 3, 2024, which means exploitation in the wild has been confirmed; US federal agencies had to remediate it by December 24, 2024. CISA does not currently list it as used in ransomware campaigns.
All 1 known-exploited North Grid vulnerabilities →Description
Proself Enterprise/Standard Edition Ver5.62 and earlier, Proself Gateway Edition Ver1.65 and earlier, and Proself Mail Sanitize Edition Ver1.08 and earlier allow a remote unauthenticated attacker to conduct XML External Entity (XXE) attacks. By processing a specially crafted request containing malformed XML data, arbitrary files on the server containing account information may be read by the attacker.
CVSS vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
CISA Known-Exploited Vulnerability
Product: North Grid — Proself
Name: North Grid Proself Improper Restriction of XML External Entity (XXE) Reference Vulnerability
Date added: 2024-12-03 · Due: 2024-12-24
Required action: Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable.

