CVE-2023-45727

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

  • High 7.5
  • Exploited: added to CISA KEV 3 Dec 2024

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.

Key facts

Published
18 Oct 2023
Last changed
21 Oct 2025
Assigned by
jpcert
KEV added
3 Dec 2024
KEV fix due
24 Dec 2024
EPSS
4.822% likely to be exploited in the next 30 days, higher than 92.12% of CVEs (scores for 15 Nov 2026)
SSVC (CISA)
Exploitation: active; Automatable: yes; Technical impact: partial

Severity scores

Each score is shown as its source gave it. They are not averaged or merged.

  • 7.5CVSS 3.1, Highfrom CISA (ADP container)CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

What to do

  • Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable.CISA KEV required action

Historical context and remediation

This reference retains the original CVE publication date. A recent record update does not mean a new attack occurred.

No separately sourced impact summary is available on this page yet. Consult the description, version data and dated exploitation evidence.

Version statuses below come from the CNA. An “unaffected” version is not necessarily a currently supported release or proof of a patch date. EPSS is a dated risk estimate, not a count of historical attacks.

Read the original CVE record.

Affected products

VendorProductVersions
North Grid CorporationProself Enterprise/Standard Edition
  • Ver5.62 and earlier (affected)
North Grid CorporationProself Gateway Edition
  • Ver1.65 and earlier (affected)
North Grid CorporationProself Mail Sanitize Edition
  • Ver1.08 and earlier (affected)

Timeline

  1. 18 Oct 2023 Published
  2. 3 Dec 2024 CVE-2023-45727 added to CISA KEV
  3. 3 Dec 2024 Added to the CISA KEV catalogue

Weakness

Practice this bug class

HackZoneLabs has a hands-on lab on XXE (CWE-611).

References