How severe is CVE-2023-45727?

CVE-2023-45727 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity none, and availability none.

Is CVE-2023-45727 being actively exploited?

Yes. CVE-2023-45727 is on CISA's Known Exploited Vulnerabilities (KEV) catalog, added on 2024-12-03, which means active exploitation has been confirmed. It should be prioritised for remediation.

What products are affected by CVE-2023-45727?

CVE-2023-45727 primarily affects Northgrid Proself. In total, 4 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2023-45727?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Because this CVE is known to be actively exploited, treat remediation as urgent — CISA KEV typically sets a short remediation deadline.

Does CVE-2023-45727 have an EU (EUVD) identifier?

Yes. CVE-2023-45727 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2023-50016. It is also flagged as exploited in the EUVD (since 2024-12-03).

When was CVE-2023-45727 published?

CVE-2023-45727 was published on 2023-10-18 and last updated on 2026-06-17.

CVE-2023-45727

CVE-2023-45727 is a high-severity vulnerability in Northgrid Proself with a CVSS 3.x base score of 7.5. It is listed in CISA's Known Exploited Vulnerabilities (KEV) catalog, confirming it has been exploited in the wild (added 2024-12-03). The underlying weakness is classified as CWE-611.

Key facts

Severity: High (CVSS 3.x base score 7.5)
EPSS exploit prediction: 4% (88th percentile)
Actively exploited: Yes — listed in CISA KEV (added 2024-12-03)
EU (EUVD) id: EUVD-2023-50016
EU exploitation: Flagged exploited in the ENISA EU Vulnerability Database (since 2024-12-03)
Weakness: CWE-611
Affected product: Northgrid Proself
Published: 2023-10-18
Last modified: 2026-06-17

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.

Frequently asked questions

What is CVE-2023-45727?: 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.
How severe is CVE-2023-45727?: CVE-2023-45727 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity none, and availability none.
Is CVE-2023-45727 being actively exploited?: Yes. CVE-2023-45727 is on CISA's Known Exploited Vulnerabilities (KEV) catalog, added on 2024-12-03, which means active exploitation has been confirmed. It should be prioritised for remediation.
What products are affected by CVE-2023-45727?: CVE-2023-45727 primarily affects Northgrid Proself. In total, 4 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2023-45727?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Because this CVE is known to be actively exploited, treat remediation as urgent — CISA KEV typically sets a short remediation deadline.
Does CVE-2023-45727 have an EU (EUVD) identifier?: Yes. CVE-2023-45727 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2023-50016. It is also flagged as exploited in the EUVD (since 2024-12-03).
When was CVE-2023-45727 published?: CVE-2023-45727 was published on 2023-10-18 and last updated on 2026-06-17.

References

Affected products (4)

cpe:2.3:a:northgrid:proself:*:*:*:*:mail_sanitize:*:*:*
cpe:2.3:a:northgrid:proself:*:*:*:*:gateway:*:*:*
cpe:2.3:a:northgrid:proself:*:*:*:*:enterprise:*:*:*
cpe:2.3:a:northgrid:proself:*:*:*:*:standard:*:*:*

More vulnerabilities in Northgrid Proself

CVE-2023-39415 — High (CVSS 7.5): Improper authentication vulnerability in Proself Enterprise/Standard Edition Ver5.61 and earlier, Proself Gateway…
CVE-2023-39416 — High (CVSS 7.2): Proself Enterprise/Standard Edition Ver5.61 and earlier, Proself Gateway Edition Ver1.62 and earlier, and Proself Mail…

All CVEs affecting Northgrid Proself →

Other CWE-611 (Improper Restriction of XML External Entity Reference (XXE)) vulnerabilities

CVE-2022-22486 — Critical (CVSS 10.0): IBM Tivoli Workload Scheduler 9.4, 9.5, and 10.1 is vulnerable to an XML External Entity Injection (XXE) attack when…
CVE-2019-14678 — Critical (CVSS 10.0): SAS XML Mapper 9.45 has an XML External Entity (XXE) vulnerability that can be leveraged by malicious attackers in…
CVE-2015-9280 — Critical (CVSS 10.0): MailEnable before 8.60 allows XXE via an XML document in the request.aspx Options parameter.
CVE-2018-1000838 — Critical (CVSS 10.0): autopsy version <= 4.9.0 contains a XML External Entity (XXE) vulnerability in CaseMetadata XML Parser that can result…
CVE-2018-1000837 — Critical (CVSS 10.0): UML Designer version <= 8.0.0 contains a XML External Entity (XXE) vulnerability in XML parser for plugins that can…
CVE-2018-1000835 — Critical (CVSS 10.0): KeePassDX version <= 2.5.0.0beta17 contains a XML External Entity (XXE) vulnerability in kdbx file parser that can…

Browse all CWE-611 (Improper Restriction of XML External Entity Reference (XXE)) vulnerabilities →