How severe is CVE-2023-30803?

CVE-2023-30803 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-2023-30803 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 18% (97th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2023-30803?

CVE-2023-30803 affects Sangfor Next-gen Application Firewall. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2023-30803?

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-2023-30803 published?

CVE-2023-30803 was published on 2023-10-10 and last updated on 2026-06-17.

CVE-2023-30803

CVE-2023-30803 is a critical-severity vulnerability in Sangfor Next-gen Application Firewall with a CVSS 3.x base score of 9.8. Its EPSS exploit-prediction score of 18% places it in the 97th percentile, indicating an elevated likelihood of exploitation. The underlying weakness is classified as CWE-290.

Key facts

Severity: Critical (CVSS 3.x base score 9.8)
EPSS exploit prediction: 18% (97th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-290
Affected product: Sangfor Next-gen Application Firewall
Published: 2023-10-10
Last modified: 2026-06-17

Description

The Sangfor Next-Gen Application Firewall version NGAF8.0.17 is vulnerable to an authentication bypass vulnerability. A remote and unauthenticated attacker can bypass authentication and access administrative functionality by sending HTTP requests using a crafted Y-forwarded-for header.

Frequently asked questions

What is CVE-2023-30803?: The Sangfor Next-Gen Application Firewall version NGAF8.0.17 is vulnerable to an authentication bypass vulnerability. A remote and unauthenticated attacker can bypass authentication and access administrative functionality by sending HTTP requests using a crafted Y-forwarded-for header.
How severe is CVE-2023-30803?: CVE-2023-30803 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-2023-30803 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 18% (97th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2023-30803?: CVE-2023-30803 affects Sangfor Next-gen Application Firewall. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2023-30803?: 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-2023-30803 published?: CVE-2023-30803 was published on 2023-10-10 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:sangfor:next-gen_application_firewall:8.0.17:*:*:*:*:*:*:*

More vulnerabilities in Sangfor Next-gen Application Firewall

CVE-2023-30806 — Critical (CVSS 9.8): The Sangfor Next-Gen Application Firewall version NGAF8.0.17 is vulnerable to an operating system command injection…
CVE-2023-30805 — Critical (CVSS 9.8): The Sangfor Next-Gen Application Firewall version NGAF8.0.17 is vulnerable to an operating system command injection…
CVE-2023-30802 — Medium (CVSS 5.3): The Sangfor Next-Gen Application Firewall version NGAF8.0.17 is vulnerable to a source code disclosure vulnerability. A…
CVE-2023-30804 — Medium (CVSS 4.9): The Sangfor Next-Gen Application Firewall version NGAF8.0.17 is vulnerable to an authenticated file disclosure…

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