How severe is CVE-2023-53923?

CVE-2023-53923 has a CVSS 3.x base score of 9.8, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2023-53923 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (37th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2023-53923?

CVE-2023-53923 affects Ulicms. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2023-53923?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.

Does CVE-2023-53923 have an EU (EUVD) identifier?

Yes. CVE-2023-53923 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2023-60208.

When was CVE-2023-53923 published?

CVE-2023-53923 was published on 2025-12-17 and last updated on 2026-06-17.

CVE-2023-53923

CVE-2023-53923 is a critical-severity vulnerability in Ulicms with a CVSS 3.x base score of 9.8. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-862.

Key facts

Severity: Critical (CVSS 3.x base score 9.8)
CVSS v4: 9.3
EPSS exploit prediction: 0% (37th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2023-60208
Weakness: CWE-862
Affected product: Ulicms
Published: 2025-12-17
Last modified: 2026-06-17

Description

UliCMS 2023.1 contains a privilege escalation vulnerability that allows unauthenticated attackers to create administrative accounts through the UserController endpoint. Attackers can send a crafted POST request to /dist/admin/index.php with specific parameters to generate a new admin user with full system access.

Frequently asked questions

What is CVE-2023-53923?: UliCMS 2023.1 contains a privilege escalation vulnerability that allows unauthenticated attackers to create administrative accounts through the UserController endpoint. Attackers can send a crafted POST request to /dist/admin/index.php with specific parameters to generate a new admin user with full system access.
How severe is CVE-2023-53923?: CVE-2023-53923 has a CVSS 3.x base score of 9.8, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2023-53923 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (37th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2023-53923?: CVE-2023-53923 affects Ulicms. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2023-53923?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.
Does CVE-2023-53923 have an EU (EUVD) identifier?: Yes. CVE-2023-53923 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2023-60208.
When was CVE-2023-53923 published?: CVE-2023-53923 was published on 2025-12-17 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:ulicms:ulicms:2023.1:*:*:*:*:*:*:*

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