CVE-2023-45727: Technical Deep-Dive (Auto Refreshed)

Generated on 2026-03-25T00:20:07.348Z. This file is automatically regenerated every 30 minutes by the CVE AI enrichment job using web sources (NVD, MITRE, CISA KEV, GitHub).

Executive Technical Summary

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.

• Context preserved from previous revision: 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. Notes: Ostorlab KEV: One-command to detect most remotely known exploitable vulnerabilities. Sourced from CISA KEV, Google's Tsunami, Ostorlab's Asteroid and Bug Bounty programs.

Technical Details

• CVE: CVE-2023-45727
• KEV date added: 2024-12-03
• KEV due date: 2024-12-24
• NVD published: Unknown
• NVD modified: Unknown
• MITRE modified: 2025-10-21
• CVSS base score: N/A
• CVSS vector: N/A
• CVSS exploitability score: N/A
• CVSS impact score: N/A
• Attack vector: Unknown
• Attack complexity: Unknown
• Privileges required: Unknown
• User interaction: Unknown
• Scope: Unknown
• Confidentiality impact: Unknown
• Integrity impact: Unknown
• Availability impact: Unknown

Versions and Products Impacted

• North Grid Corporation / Proself Enterprise/Standard Edition (versions: Ver5.62 and earlier)
• North Grid Corporation / Proself Gateway Edition (versions: Ver1.65 and earlier)
• North Grid Corporation / Proself Mail Sanitize Edition (versions: Ver1.08 and earlier)
• northgrid / proself (versions: 0)

Weakness Classification

• XML external entities (XXE)
• CWE-611

Repositories for Lab Validation (Public Examples)

• No public repository matched this CVE query in the current run.

People and Organizations Mentioned

• jpcert
• North Grid
• Proself

Practical Defensive Validation (Authorized Only)

1. Use only isolated environments and systems you own or are explicitly authorized to test.
2. Snapshot infrastructure before validation and preserve baseline logs (EDR, SIEM, OS, app).
3. Inventory North Grid Corporation / Proself Enterprise/Standard Edition (versions: Ver5.62 and earlier) assets and confirm exact vulnerable versions with automated checks.
4. Patch in staged environments and validate closure with scanners + service health checks.
5. Map detections to MITRE ATT&CK tactics relevant to your environment and tune alert quality.

References

• NVD record: https://nvd.nist.gov/vuln/detail/CVE-2023-45727
• MITRE CVE record: https://www.cve.org/CVERecord?id=CVE-2023-45727
• CISA KEV Catalog: https://www.cisa.gov/known-exploited-vulnerabilities-catalog
• CISA KEV JSON feed: https://www.cisa.gov/sites/default/files/feeds/known_exploited_vulnerabilities.json
• KEV notes: https://www.proself.jp/information/153/ ; https://nvd.nist.gov/vuln/detail/CVE-2023-45727
• https://www.proself.jp/information/153/
• https://jvn.jp/en/jp/JVN95981460/
• https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2023-45727

This content is for defensive security training and authorized validation only.