North Grid Proself Improper Restriction of XML External Entity (XXE) Reference Vulnerability
North Grid Corporation — Proself Enterprise/Standard Edition
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.
7.5
3.5%
Vector breakdown
- Attack vector
- Network
- Attack complexity
- Low
- Privileges required
- None
- User interaction
- None
- Scope
- Unchanged
- Confidentiality
- High
- Integrity
- None
- Availability
- None
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
- Published
- Oct 18, 2023
- Modified
- Oct 21, 2025
- Added to KEV
- Dec 3, 2024
- Federal patch due
- Dec 24, 2024
CISA required action
Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable.
Weakness classification
Proof-of-concept & exploitation references
Weaponization
Public repositories whose name or description references CVE-2023-45727, found via a live GitHub search at request time. These are community-sourced signals, not a verified working exploit - cross-check each one before relying on it, and treat higher star counts and recent activity as (weak) corroboration, not proof.
No public GitHub repositories referencing CVE-2023-45727 were found at last check. Absence here is not proof no exploit exists - see the references below for vendor advisories and write-ups.
References
Frequently asked questions
What is CVE-2023-45727?
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.
How severe is CVE-2023-45727?
CVE-2023-45727 has a CVSS base score of 7.5 out of 10 (CVSS 3.1).
Is CVE-2023-45727 actively exploited in the wild?
Yes. CVE-2023-45727 is listed in the CISA Known Exploited Vulnerabilities (KEV) catalog, added Dec 3, 2024, meaning CISA has confirmed evidence of active exploitation.
What is the EPSS score for CVE-2023-45727?
3.5% - meaning FIRST.org's EPSS model estimates a 3.5% probability this vulnerability will be exploited in the wild within 30 days (88% percentile among all scored CVEs).
What type of vulnerability is CVE-2023-45727?
CVE-2023-45727 is classified under CWE-611 (CWE-611 Improper Restriction of XML External Entity Reference).
Cross-checked against
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