How severe is CVE-2023-34388?

CVE-2023-34388 has a CVSS 3.x base score of 6.5, rated medium severity. It is exploitable over an adjacent network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity high, and availability none.

Is CVE-2023-34388 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (56th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2023-34388?

CVE-2023-34388 primarily affects Selinc Sel-451 Firmware. In total, 3 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2023-34388?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

When was CVE-2023-34388 published?

CVE-2023-34388 was published on 2023-11-30 and last updated on 2026-06-17.

CVE-2023-34388

CVE-2023-34388 is a medium-severity vulnerability in Selinc Sel-451 Firmware with a CVSS 3.x base score of 6.5. 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-287.

Key facts

Severity: Medium (CVSS 3.x base score 6.5)
EPSS exploit prediction: 1% (56th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-287
Affected product: Selinc Sel-451 Firmware
Published: 2023-11-30
Last modified: 2026-06-17

Description

An Improper Authentication vulnerability in the Schweitzer Engineering Laboratories SEL-451 could allow a remote unauthenticated attacker to potentially perform session hijacking attack and bypass authentication. See product Instruction Manual Appendix A dated 20230830 for more details.

Frequently asked questions

What is CVE-2023-34388?: An Improper Authentication vulnerability in the Schweitzer Engineering Laboratories SEL-451 could allow a remote unauthenticated attacker to potentially perform session hijacking attack and bypass authentication. See product Instruction Manual Appendix A dated 20230830 for more details.
How severe is CVE-2023-34388?: CVE-2023-34388 has a CVSS 3.x base score of 6.5, rated medium severity. It is exploitable over an adjacent network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity high, and availability none.
Is CVE-2023-34388 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (56th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2023-34388?: CVE-2023-34388 primarily affects Selinc Sel-451 Firmware. In total, 3 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2023-34388?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2023-34388 published?: CVE-2023-34388 was published on 2023-11-30 and last updated on 2026-06-17.

References

Affected products (3)

cpe:2.3:o:selinc:sel-451_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:selinc:sel-451_firmware:r326-v0:*:*:*:*:*:*:*
cpe:2.3:o:selinc:sel-451_firmware:r327-v0:*:*:*:*:*:*:*

More vulnerabilities in Selinc Sel-451 Firmware

CVE-2023-31176 — High (CVSS 7.5): An Insufficient Entropy vulnerability in the Schweitzer Engineering Laboratories SEL-451 could allow an unauthenticated…
CVE-2023-34390 — Medium (CVSS 4.5): An input validation vulnerability in the Schweitzer Engineering Laboratories SEL-451 could allow a remote authenticated…
CVE-2023-34389 — Medium (CVSS 4.5): An allocation of resources without limits or throttling vulnerability in the Schweitzer Engineering Laboratories…
CVE-2023-31177 — Medium (CVSS 4.3): An Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') in the Schweitzer Engineering…

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Other CWE-287 (Improper Authentication) vulnerabilities

CVE-2026-45480 — Critical (CVSS 10.0): Improper authentication in Azure Active Directory allows an unauthorized attacker to elevate privileges over a network.
CVE-2026-46389 — Critical (CVSS 10.0): UDS Identity Config builds the Keycloak configuration image (realm, plugins, theme, truststore, JARs) consumed by UDS…
CVE-2026-10611 — Critical (CVSS 10.0): An authentication bypass vulnerability exists in MISP when LDAP mixed authentication is enabled with OTP enforcement.…
CVE-2026-47280 — Critical (CVSS 10.0): Improper authentication in Azure Resource Manager (ARM) allows an unauthorized attacker to elevate privileges over a…
CVE-2026-42822 — Critical (CVSS 10.0): Improper authentication in Azure Local Disconnected Operations allows an unauthorized attacker to elevate privileges…
CVE-2026-20182 — Critical (CVSS 10.0): May 2026: This security advisory provides the details and fix information for a vulnerability that was discovered and…

Browse all CWE-287 (Improper Authentication) vulnerabilities →