How severe is CVE-2025-34300?

CVE-2025-34300 has a CVSS 4.0 base score of 10.0, rated critical severity.

Is CVE-2025-34300 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 49% (99th percentile), an estimate of the probability of exploitation in the next 30 days.

How do I fix CVE-2025-34300?

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-2025-34300 have an EU (EUVD) identifier?

Yes. CVE-2025-34300 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-21694.

When was CVE-2025-34300 published?

CVE-2025-34300 was published on 2025-07-16 and last updated on 2026-06-17.

CVE-2025-34300

CVE-2025-34300 is a critical-severity vulnerability with a CVSS 4.0 base score of 10.0. Its EPSS exploit-prediction score of 49% places it in the 99th percentile, indicating an elevated likelihood of exploitation. The underlying weakness is classified as CWE-20.

Key facts

Severity: Critical (CVSS 4.0 base score 10.0)
EPSS exploit prediction: 49% (99th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2025-21694
Weakness: CWE-20
Published: 2025-07-16
Last modified: 2026-06-17

Description

A template injection vulnerability exists in Sawtooth Software’s Lighthouse Studio versions prior to 9.16.14 via the ciwweb.pl http://ciwweb.pl/ Perl web application. Exploitation allows an unauthenticated attacker can execute arbitrary commands.

Frequently asked questions

What is CVE-2025-34300?: A template injection vulnerability exists in Sawtooth Software’s Lighthouse Studio versions prior to 9.16.14 via the ciwweb.pl http://ciwweb.pl/ Perl web application. Exploitation allows an unauthenticated attacker can execute arbitrary commands.
How severe is CVE-2025-34300?: CVE-2025-34300 has a CVSS 4.0 base score of 10.0, rated critical severity.
Is CVE-2025-34300 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 49% (99th percentile), an estimate of the probability of exploitation in the next 30 days.
How do I fix CVE-2025-34300?: 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-2025-34300 have an EU (EUVD) identifier?: Yes. CVE-2025-34300 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-21694.
When was CVE-2025-34300 published?: CVE-2025-34300 was published on 2025-07-16 and last updated on 2026-06-17.

References

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