How severe is CVE-2023-23780?

CVE-2023-23780 has a CVSS 3.x base score of 8.0, rated high severity. It is exploitable over an adjacent network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2023-23780 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (52nd percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2023-23780?

CVE-2023-23780 affects Fortinet Fortiweb. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2023-23780?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.

When was CVE-2023-23780 published?

CVE-2023-23780 was published on 2023-02-16 and last updated on 2026-06-17.

CVE-2023-23780

CVE-2023-23780 is a high-severity vulnerability in Fortinet Fortiweb with a CVSS 3.x base score of 8.0. 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-787.

Key facts

Severity: High (CVSS 3.x base score 8.0)
EPSS exploit prediction: 1% (52nd percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-787
Affected product: Fortinet Fortiweb
Published: 2023-02-16
Last modified: 2026-06-17

Description

A stack-based buffer overflow in Fortinet FortiWeb version 7.0.0 through 7.0.1, Fortinet FortiWeb version 6.3.6 through 6.3.19, Fortinet FortiWeb 6.4 all versions allows attacker to escalation of privilege via specifically crafted HTTP requests.

Frequently asked questions

What is CVE-2023-23780?: A stack-based buffer overflow in Fortinet FortiWeb version 7.0.0 through 7.0.1, Fortinet FortiWeb version 6.3.6 through 6.3.19, Fortinet FortiWeb 6.4 all versions allows attacker to escalation of privilege via specifically crafted HTTP requests.
How severe is CVE-2023-23780?: CVE-2023-23780 has a CVSS 3.x base score of 8.0, rated high severity. It is exploitable over an adjacent network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2023-23780 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (52nd percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2023-23780?: CVE-2023-23780 affects Fortinet Fortiweb. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2023-23780?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
When was CVE-2023-23780 published?: CVE-2023-23780 was published on 2023-02-16 and last updated on 2026-06-17.

References

https://fortiguard.com/psirt/FG-IR-22-118

Affected products (1)

cpe:2.3:a:fortinet:fortiweb:*:*:*:*:*:*:*:*

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