How severe is CVE-2025-34299?

CVE-2025-34299 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-2025-34299 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 73% (99th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2025-34299?

CVE-2025-34299 affects Monstaftp Monsta Ftp. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2025-34299?

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.

Does CVE-2025-34299 have an EU (EUVD) identifier?

Yes. CVE-2025-34299 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-38247.

When was CVE-2025-34299 published?

CVE-2025-34299 was published on 2025-11-07 and last updated on 2026-06-17.

CVE-2025-34299

CVE-2025-34299 is a critical-severity vulnerability in Monstaftp Monsta Ftp with a CVSS 3.x base score of 9.8. Its EPSS exploit-prediction score of 73% places it in the 99th percentile, indicating an elevated likelihood of exploitation. The underlying weakness is classified as CWE-434.

Key facts

Severity: Critical (CVSS 3.x base score 9.8)
CVSS v4: 9.3
EPSS exploit prediction: 73% (99th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2025-38247
Weakness: CWE-434
Affected product: Monstaftp Monsta Ftp
Published: 2025-11-07
Last modified: 2026-06-17

Description

Monsta FTP versions 2.11 and earlier contain a vulnerability that allows unauthenticated arbitrary file uploads. This flaw enables attackers to execute arbitrary code by uploading a specially crafted file from a malicious (S)FTP server.

Frequently asked questions

What is CVE-2025-34299?: Monsta FTP versions 2.11 and earlier contain a vulnerability that allows unauthenticated arbitrary file uploads. This flaw enables attackers to execute arbitrary code by uploading a specially crafted file from a malicious (S)FTP server.
How severe is CVE-2025-34299?: CVE-2025-34299 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-2025-34299 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 73% (99th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2025-34299?: CVE-2025-34299 affects Monstaftp Monsta Ftp. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2025-34299?: 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.
Does CVE-2025-34299 have an EU (EUVD) identifier?: Yes. CVE-2025-34299 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-38247.
When was CVE-2025-34299 published?: CVE-2025-34299 was published on 2025-11-07 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:monstaftp:monsta_ftp:*:*:*:*:*:*:*:*

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