How severe is CVE-2025-55346?

CVE-2025-55346 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-2025-55346 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 17% (97th percentile), an estimate of the probability of exploitation in the next 30 days.

How do I fix CVE-2025-55346?

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-2025-55346 have an EU (EUVD) identifier?

Yes. CVE-2025-55346 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-24803.

When was CVE-2025-55346 published?

CVE-2025-55346 was published on 2025-08-14 and last updated on 2026-06-17.

CVE-2025-55346

CVE-2025-55346 is a critical-severity vulnerability with a CVSS 3.x base score of 9.8. Its EPSS exploit-prediction score of 17% places it in the 97th percentile, indicating an elevated likelihood of exploitation. The underlying weakness is classified as CWE-94.

Key facts

Severity: Critical (CVSS 3.x base score 9.8)
EPSS exploit prediction: 17% (97th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2025-24803
Weakness: CWE-94
Published: 2025-08-14
Last modified: 2026-06-17

Description

User-controlled input flows to an unsafe implementation of a dynamic Function constructor, allowing network attackers to run arbitrary unsandboxed JS code in the context of the host, by sending a simple POST request.

Frequently asked questions

What is CVE-2025-55346?: User-controlled input flows to an unsafe implementation of a dynamic Function constructor, allowing network attackers to run arbitrary unsandboxed JS code in the context of the host, by sending a simple POST request.
How severe is CVE-2025-55346?: CVE-2025-55346 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-2025-55346 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 17% (97th percentile), an estimate of the probability of exploitation in the next 30 days.
How do I fix CVE-2025-55346?: 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-2025-55346 have an EU (EUVD) identifier?: Yes. CVE-2025-55346 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-24803.
When was CVE-2025-55346 published?: CVE-2025-55346 was published on 2025-08-14 and last updated on 2026-06-17.

References

https://research.jfrog.com/vulnerabilities/flowise-js-injection-remote-code-exection-jfsa-2025-001379925/

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