CVE-2023-45727

Name: CVE-2023-45727
Creator: NVD / NIST
Published: 2023-10-18T10:15:08.643+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

HIGHCVSS 7.5/10Actively ExploitedEPSS 3.54%

Last modified Jun 17, 2026

CVE-2023-45727 is a high-severity vulnerability rated 7.5/10 on the CVSS scale. 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 has confirmed active exploitation in the wild. EPSS estimates a 3.54% chance of exploitation in the next 30 days.

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.

Metrics

CVSS 3.1

7.5/10

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

EPSS Probability

3.54%

87.8th percentile

Probability of exploitation in the next 30 days. Learn more

Exploitation Status

This vulnerability is listed in CISA’s Known Exploited Vulnerabilities catalog, confirming active exploitation in the wild. Federal agencies must remediate by Dec 24, 2024.

Weakness Enumeration

Affected Software

Vendor	Product	Versions
Northgrid	Proself	< 1.09
Northgrid	Proself	< 1.66
Northgrid	Proself	< 5.63

References

https://jvn.jp/en/jp/JVN95981460/Third Party Advisory
https://www.proself.jp/information/153/Vendor Advisory
https://jvn.jp/en/jp/JVN95981460/Third Party Advisory
https://www.proself.jp/information/153/Vendor Advisory
https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2023-45727US Government Resource

Timeline

Published: Oct 18, 2023
Last Modified: Jun 17, 2026
Status: Analyzed

Frequently Asked Questions

What is CVE-2023-45727?

How severe is CVE-2023-45727?

CVE-2023-45727 has a CVSS score of 7.5/10 (HIGH severity). The EPSS model estimates a 3.54% probability of exploitation in the next 30 days. This vulnerability is listed in CISA's Known Exploited Vulnerabilities catalog.

How do I fix CVE-2023-45727?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2023-45727?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST