---
id: "CVE-2023-45727"
kind: "vulnerability"
aliases: ["CVE-2023-45727"]
title: "northgrid proself: Proself Enterprise/Standard Edition Ver5.62 and earlier, Proself Gateway Edition Ver1.65 and earlier, and Proself\u2026"
severity: "high"
cvss: 7.5
epss: null
exploited: true
status: "open"
category: "vendor"
products: [{"name": "North Grid Proself", "fixed": [], "affected": "", "ecosystem": "vendor"}, {"name": "northgrid proself", "fixed": ["1.09"], "affected": "< 1.09", "ecosystem": "vendor"}, {"name": "northgrid proself", "fixed": ["1.66"], "affected": "< 1.66", "ecosystem": "vendor"}, {"name": "northgrid proself", "fixed": ["5.63"], "affected": "< 5.63", "ecosystem": "vendor"}]
ecosystems: ["vendor"]
tags: ["exploited", "file-sharing", "proself", "self-hosted", "vendor"]
not_affected_if: ["default-config"]
published_at: "2023-10-18T10:15:08+00:00"
first_seen_at: "2026-10-23T19:11:51+00:00"
updated_at: "2026-10-23T22:29:05+00:00"
sources: [{"source": "kev", "url": "https://www.cisa.gov/known-exploited-vulnerabilities-catalog?search_api_fulltext=CVE-2023-45727", "first_seen_at": "2026-10-23T19:11:51+00:00"}, {"source": "nvd", "url": "https://nvd.nist.gov/vuln/detail/CVE-2023-45727", "first_seen_at": "2026-10-23T22:29:05+00:00"}]
---

# northgrid proself: Proself Enterprise/Standard Edition Ver5.62 and earlier, Proself Gateway Edition Ver1.65 and earlier, and Proself…

North Grid Proself Enterprise/Standard, Gateway, and Mail Sanitize contain an XML External Entity (XXE) flaw that lets a remote attacker read server files or reach internal systems. The attack needs no login and the flaw is listed as actively exploited.

_Summary, check and fix written by a model from the sources; labelled as such._

## Affected

- vendor:North Grid Proself affected ? fixed ?
- vendor:northgrid proself affected < 1.09 fixed 1.09
- vendor:northgrid proself affected < 1.66 fixed 1.66
- vendor:northgrid proself affected < 5.63 fixed 5.63

## Fix

Apply the vendor mitigation for Proself per CISA guidance, or stop using the product if no mitigation is available.

## Timeline

- 2026-10-23T19:11:51+00:00 kev https://www.cisa.gov/known-exploited-vulnerabilities-catalog?search_api_fulltext=CVE-2023-45727
- 2026-10-23T22:29:05+00:00 nvd https://nvd.nist.gov/vuln/detail/CVE-2023-45727

## From the sources

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.

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_Free to read at a human pace. An API with keys and an MCP server are in preparation; early access: hello@infrastack.ai_