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

> CVE-2023-45727: North Grid Proself Improper Restriction of XML External Entity (XXE) Reference Vulnerability. CVSS 7.5 (CVSS 3.1), in CISA KEV.

Canonical: https://rewindex.com/cve/CVE-2023-45727
Last updated: 2025-10-21T23:05:34Z

- Published: 2023-10-18 09:01 UTC · Updated: 2025-10-21 23:05 UTC · Assigner: jpcert
- CVSS: 7.5 (CVSS 3.1) · Severity: High · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
- EPSS: 4.8%, 92th percentile (scored 2026-10-25)
- CISA KEV: yes, added 2024-12-03, federal due date 2024-12-24, ransomware use: Unknown

## 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.

## CISA required action

Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable.

## Affected vendors and products

- northgrid: proself
- North Grid Corporation: Proself Enterprise/Standard Edition
- North Grid Corporation: Proself Gateway Edition
- North Grid Corporation: Proself Mail Sanitize Edition

## References

- [CVE record on cve.org](https://www.cve.org/CVERecord?id=CVE-2023-45727)
- [NVD entry](https://nvd.nist.gov/vuln/detail/CVE-2023-45727)
- [https://jvn.jp/en/jp/JVN95981460/](https://jvn.jp/en/jp/JVN95981460/)
- [https://www.proself.jp/information/153/](https://www.proself.jp/information/153/)

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_Sources: CVE records from the CVE Program (cve.org). CVE® is a registered trademark of The MITRE Corporation. (https://www.cve.org/) This product uses data from the NVD API but is not endorsed or certified by the NVD. (https://nvd.nist.gov/) Known Exploited Vulnerabilities catalog from CISA. (https://www.cisa.gov/known-exploited-vulnerabilities-catalog) EPSS scores from FIRST (Exploit Prediction Scoring System). (https://www.first.org/epss/)_


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Canonical: https://rewindex.com/cve/CVE-2023-45727 · Markdown: https://rewindex.com/cve/CVE-2023-45727.md · JSON: https://rewindex.com/api/v1/cves/CVE-2023-45727 · Data licensed CC BY 4.0 (https://creativecommons.org/licenses/by/4.0/) · Generated 2026-10-26T02:16:59.693Z