Is CVE-2023-28503 in the CISA KEV catalog?

No. CVE-2023-28503 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2023-28503?

CVE-2023-28503 has a CVSS v3 base score of 9.8 (CRITICAL).

What is the EPSS score for CVE-2023-28503?

CVE-2023-28503 has an EPSS score of 62.14% (99th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix or mitigate CVE-2023-28503?

No published fix for CVE-2023-28503 has been found yet. Check the linked vendor advisories for guidance as it becomes available.

CVE & CISA-KEV Catalog

CVE-2023-28503

CRITICALEPSS 99th pctl

9.8

CVSS v3

NVD

Description

Rocket Software UniData versions prior to 8.2.4 build 3003 and UniVerse versions prior to 11.3.5 build 1001 or 12.2.1 build 2002 suffer from an authentication bypass vulnerability, where a special username with a deterministic password can be leveraged to bypass authentication checks and execute OS commands as the root user.

CWE-798Hard-coded Credentials CWE-287Improper Authentication

How to fix

No published remediation has been found for this vulnerability's affected products yet.

Mitigation guidance may be in the linked vendor advisories in the References section below.

TridentStack Control tracks known vulnerabilities across your Windows, macOS, and Linux fleet and shows the fix as soon as one is published. See how it works

CVSS v3 Vector

Exploitability

Attack VectorNetwork

Attack ComplexityLow

Privileges RequiredNone

User InteractionNone

ScopeUnchanged

Impact

ConfidentialityHigh

IntegrityHigh

AvailabilityHigh

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

Exploit Intelligence

62.14%probability of exploitation in 30 days

99thpercentile

Very high risk: more likely to be exploited than 99% of all known CVEs.

References

Third-Party Advisory1

rapid7.com

Other references1

packetstormsecurity.com

Related Vulnerabilities

Other CWE-798 (Hard-coded Credentials) vulnerabilities, ordered by exploit likelihood. View all

CVE	Severity	CVSS	EPSS	Exploited	Fix
CVE-2022-26138	Critical	9.8	98%	KEV	-
CVE-2024-3272	Critical	9.8	98%	KEV	-
CVE-2025-30406	Critical	9.0	94%	KEV	Fix
CVE-2024-28987	Critical	9.1	93%	KEV	Fix
CVE-2019-15976	Critical	9.8	93%	-	Fix
CVE-2024-20439	Critical	9.8	92%	KEV	Fix

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This product uses NVD data but is not endorsed or certified by the NVD. EPSS scores courtesy of FIRST.org (https://www.first.org/epss). Source: CISA KEV Catalog. Data as of 2025-02-18.