How severe is CVE-2023-50477?

CVE-2023-50477 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-2023-50477 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (50th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2023-50477?

CVE-2023-50477 affects Nos Nos Client. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2023-50477?

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.

When was CVE-2023-50477 published?

CVE-2023-50477 was published on 2023-12-21 and last updated on 2026-06-17.

CVE-2023-50477

CVE-2023-50477 is a critical-severity vulnerability in Nos Nos Client 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.

Key facts

Severity: Critical (CVSS 3.x base score 9.8)
EPSS exploit prediction: 1% (50th percentile)
Actively exploited: Not listed in CISA KEV
Affected product: Nos Nos Client
Published: 2023-12-21
Last modified: 2026-06-17

Description

An issue was discovered in nos client version 0.6.6, allows remote attackers to escalate privileges via getRPCEndpoint.js.

Frequently asked questions

What is CVE-2023-50477?: An issue was discovered in nos client version 0.6.6, allows remote attackers to escalate privileges via getRPCEndpoint.js.
How severe is CVE-2023-50477?: CVE-2023-50477 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-2023-50477 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (50th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2023-50477?: CVE-2023-50477 affects Nos Nos Client. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2023-50477?: 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.
When was CVE-2023-50477 published?: CVE-2023-50477 was published on 2023-12-21 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:nos:nos_client:0.6.6:*:*:*:*:*:*:*