Which products and versions are affected by CVE-2025-34300?

Affected: Lighthouse Studio. The full list is in the CVE brief.

Is CVE-2025-34300 being exploited in the wild?

It is exploited in the wild, listed in Industry KEV feed since Aug 7, 2025.

Is CVE-2025-34300 in the CISA KEV catalog?

No, it is not currently listed in the CISA Known Exploited Vulnerabilities catalog.

Is there a public exploit for CVE-2025-34300?

Public exploit code is available.

Is there a fix for CVE-2025-34300?

Fixed versions are available, including Lighthouse Studio 9.16.14.

How urgently should CVE-2025-34300 be patched?

Brandefense priority: patch immediately, because it is listed as exploited in the wild.

Request A Demo

Vulnerability Intelligence

CVE-2025-34300

CriticalExploitedPublic exploit

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.

Published Jul 16, 2025 · Updated May 26, 2026

Key Facts

Patch immediately

CVE-2025-34300 is a critical-severity vulnerability (CVSS 10.0 v4) affecting Lighthouse Studio.
It is exploited in the wild, listed in Industry KEV feed since Aug 7, 2025. Public exploit code is available.
EPSS estimates a 80% probability of exploitation in the next 30 days.
Fixed versions are available, including Lighthouse Studio 9.16.14.
Brandefense priority: patch immediately, because it is listed as exploited in the wild.

CVSS v4

10.0

CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

EPSS (30-day exploit likelihood)

80%

Higher than 99.6% of all scored CVEs

Exploited in the wild

Yes

1 catalog listing

Public exploit code

Available

Proof-of-concept or weaponized module

Get the full CVE-2025-34300 brief as a PDF

Every affected product and fixed release, exploitation status and a first 24 hours response checklist, emailed within minutes.

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.

Known-Exploited Catalog Listings

Catalog	Added	Remediation due	Ransomware use
Industry KEV feed	Aug 7, 2025	n/a	Not reported

Required action: Apply remediations or mitigations per vendor instructions or discontinue use of the product if remediation or mitigations are unavailable.

Affected Products

1 affected entries in total

Product	Affected versions	Fixed in
Lighthouse Studio	See advisory	9.16.14

Patched Releases

Lighthouse Studio

9.16.14

Timeline

Publicly disclosed
Jul 16, 2025
Added to Industry KEV feed
Aug 7, 2025
Last updated
May 26, 2026

Weakness Type

CWE-20 Improper Input Validation
CWE-1336 Improper Neutralization of Special Elements Used in a Template Engine

References

FAQ

Common Questions.

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.
Affected: Lighthouse Studio. The full list is in the CVE brief.
It is exploited in the wild, listed in Industry KEV feed since Aug 7, 2025.
No, it is not currently listed in the CISA Known Exploited Vulnerabilities catalog.
Public exploit code is available.
Fixed versions are available, including Lighthouse Studio 9.16.14.
Brandefense priority: patch immediately, because it is listed as exploited in the wild.

Is CVE-2025-34300 Running On Your Attack Surface?

Brandefense maps vulnerabilities like this one to your internet-facing assets and tells you exactly where to patch.