How severe is CVE-2023-42784?

CVE-2023-42784 has a CVSS 3.x base score of 5.6, rated medium severity. It is exploitable over network with high attack complexity, requires no privileges and no user interaction. Impact on confidentiality is low, integrity low, and availability low.

Is CVE-2023-42784 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (27th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2023-42784?

CVE-2023-42784 affects Fortinet Fortiweb. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2023-42784?

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

Does CVE-2023-42784 have an EU (EUVD) identifier?

Yes. CVE-2023-42784 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2023-47214.

When was CVE-2023-42784 published?

CVE-2023-42784 was published on 2025-03-11 and last updated on 2026-06-17.

CVE-2023-42784

CVE-2023-42784 is a medium-severity vulnerability in Fortinet Fortiweb with a CVSS 3.x base score of 5.6. 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-228.

Key facts

Severity: Medium (CVSS 3.x base score 5.6)
EPSS exploit prediction: 0% (27th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2023-47214
Weakness: CWE-228
Affected product: Fortinet Fortiweb
Published: 2025-03-11
Last modified: 2026-06-17

Description

An improper handling of syntactically invalid structure in Fortinet FortiWeb at least verions 7.4.0 through 7.4.6 and 7.2.0 through 7.2.10 and 7.0.0 through 7.0.10 allows attacker to execute unauthorized code or commands via HTTP/S crafted requests.

Frequently asked questions

What is CVE-2023-42784?: An improper handling of syntactically invalid structure in Fortinet FortiWeb at least verions 7.4.0 through 7.4.6 and 7.2.0 through 7.2.10 and 7.0.0 through 7.0.10 allows attacker to execute unauthorized code or commands via HTTP/S crafted requests.
How severe is CVE-2023-42784?: CVE-2023-42784 has a CVSS 3.x base score of 5.6, rated medium severity. It is exploitable over network with high attack complexity, requires no privileges and no user interaction. Impact on confidentiality is low, integrity low, and availability low.
Is CVE-2023-42784 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (27th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2023-42784?: CVE-2023-42784 affects Fortinet Fortiweb. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2023-42784?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
Does CVE-2023-42784 have an EU (EUVD) identifier?: Yes. CVE-2023-42784 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2023-47214.
When was CVE-2023-42784 published?: CVE-2023-42784 was published on 2025-03-11 and last updated on 2026-06-17.

References

https://fortiguard.fortinet.com/psirt/FG-IR-23-115

Affected products (1)

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

More vulnerabilities in Fortinet Fortiweb

CVE-2026-24858 — Critical (CVSS 9.8): An Authentication Bypass Using an Alternate Path or Channel vulnerability [CWE-288] vulnerability in Fortinet…
CVE-2025-59719 — Critical (CVSS 9.8): An improper verification of cryptographic signature vulnerability in Fortinet FortiWeb 8.0.0, FortiWeb 7.6.0 through…
CVE-2025-64446 — Critical (CVSS 9.8): A relative path traversal vulnerability in Fortinet FortiWeb 8.0.0 through 8.0.1, FortiWeb 7.6.0 through 7.6.4,…
CVE-2025-25257 — Critical (CVSS 9.8): An improper neutralization of special elements used in an SQL command ('SQL Injection') vulnerability [CWE-89]…
CVE-2023-25610 — Critical (CVSS 9.8): A buffer underwrite ('buffer underflow') vulnerability in the administrative interface of Fortinet FortiOS version…
CVE-2021-42756 — Critical (CVSS 9.8): Multiple stack-based buffer overflow vulnerabilities [CWE-121] in the proxy daemon of FortiWeb 5.x all versions,…

All CVEs affecting Fortinet Fortiweb →

Other CWE-228 vulnerabilities

CVE-2020-27847 — Critical (CVSS 9.8): A vulnerability exists in the SAML connector of the github.com/dexidp/dex library used to process SAML Signature…
CVE-2026-20125 — High (CVSS 7.7): A vulnerability in the HTTP Server feature of Cisco IOS Software and Cisco IOS XE Software Release 3E could allow an…
CVE-2026-42100 — High (CVSS 7.5): Improper Handling of Syntactically Invalid Structure in Sparx Pro Cloud Server allows Denial of Service (DoS) attack to…
CVE-2026-34232 — High (CVSS 7.5): Firebird is an open-source relational database management system. In versions prior to 5.0.4, 4.0.7 and 3.0.14, the…
CVE-2025-0343 — High (CVSS 7.5): Swift ASN.1 can be caused to crash when parsing certain BER/DER constructions. This crash is caused by a confusion in…
CVE-2024-21612 — High (CVSS 7.5): An Improper Handling of Syntactically Invalid Structure vulnerability in Object Flooding Protocol (OFP) service of…

Browse all CWE-228 vulnerabilities →