How severe is CVE-2023-33306?

CVE-2023-33306 has a CVSS 3.x base score of 6.5, rated medium severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability high.

Is CVE-2023-33306 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (53rd percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2023-33306?

CVE-2023-33306 primarily affects Fortinet Fortiproxy. In total, 2 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2023-33306?

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

When was CVE-2023-33306 published?

CVE-2023-33306 was published on 2023-06-16 and last updated on 2026-06-17.

CVE-2023-33306

CVE-2023-33306 is a medium-severity vulnerability in Fortinet Fortiproxy 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-476.

Key facts

Severity: Medium (CVSS 3.x base score 6.5)
EPSS exploit prediction: 1% (53rd percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-476
Affected product: Fortinet Fortiproxy
Published: 2023-06-16
Last modified: 2026-06-17

Description

A null pointer dereference in Fortinet FortiOS before 7.2.5, before 7.0.11 and before 6.4.13, FortiProxy before 7.2.4 and before 7.0.10 allows attacker to denial of sslvpn service via specifically crafted request in bookmark parameter.

Frequently asked questions

What is CVE-2023-33306?: A null pointer dereference in Fortinet FortiOS before 7.2.5, before 7.0.11 and before 6.4.13, FortiProxy before 7.2.4 and before 7.0.10 allows attacker to denial of sslvpn service via specifically crafted request in bookmark parameter.
How severe is CVE-2023-33306?: CVE-2023-33306 has a CVSS 3.x base score of 6.5, rated medium severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability high.
Is CVE-2023-33306 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (53rd percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2023-33306?: CVE-2023-33306 primarily affects Fortinet Fortiproxy. In total, 2 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2023-33306?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2023-33306 published?: CVE-2023-33306 was published on 2023-06-16 and last updated on 2026-06-17.

References

https://fortiguard.com/psirt/FG-IR-23-015

Affected products (2)

cpe:2.3:a:fortinet:fortiproxy:*:*:*:*:*:*:*:*
cpe:2.3:o:fortinet:fortios:*:*:*:*:*:*:*:*

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CVE-2026-31657 — Critical (CVSS 9.8): In the Linux kernel, the following vulnerability has been resolved: batman-adv: hold claim backbone gateways by…
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