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CVE-2023-45727

North Grid Proself Improper Restriction of XML External Entity (XXE) Reference

7.5 HIGHActively exploited (CISA KEV)EPSS 3.54%
  1. Published18 Oct 2023
  2. Added to CISA KEV3 Dec 2024
  3. Remediation due24 Dec 2024
Actively exploited (CISA KEV)

North Grid Proself Enterprise/Standard, Gateway, and Mail Sanitize contain an improper restriction of XML External Entity (XXE) reference vulnerability, which could allow a remote, unauthenticated attacker to conduct an XXE attack.

Added to KEV: 3 Dec 2024Federal remediation due: 24 Dec 2024

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.

CVSS 3.1 breakdown

Attack vectorNetwork
Attack complexityLow
Privileges requiredNone
User interactionNone
ScopeUnchanged
ConfidentialityHigh
IntegrityNone
AvailabilityNone
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

Affected products

Northgrid Proself< 5.63 · < 1.66 · < 1.09

Remediation

Fixed in
Northgrid Proself≥ 5.63

References

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Frequently asked

Is CVE-2023-45727 being actively exploited?

Yes. CVE-2023-45727 is listed in the CISA Known Exploited Vulnerabilities (KEV) catalog, added 3 Dec 2024.

How severe is CVE-2023-45727?

CVE-2023-45727 has a CVSS 3.1 base score of 7.5, rated high. EPSS estimates a 3.54% probability of exploitation.

Which products are affected by CVE-2023-45727?

Affected products include Northgrid Proself.

How do I fix CVE-2023-45727?

Upgrade affected software to a fixed version, for example Northgrid Proself 5.63 or later, then confirm no affected versions remain in your inventory.

How Secuno handles this

Secuno correlates vulnerabilities like CVE-2023-45727 against the real software inventory on every managed device, every day. Rather than a static severity, each match is scored in context: exploit availability, EPSS, the asset's exposure, and business criticality decide where it lands in the queue. Because it is on the CISA KEV list, Secuno flags any affected asset as top-priority automatically. If an affected version is present anywhere across your portfolio, it surfaces automatically with a prioritised remediation path.

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Data from the NVD, CISA KEV catalog and FIRST EPSS. CVSS 3.1 base score shown where available.