CVE-2025-66294
high-risk
Published 2025-12-01
Grav is a file-based Web platform. Prior to 1.8.0-beta.27, a Server-Side Template Injection (SSTI) vulnerability exists in Grav that allows authenticated attackers with editor permissions to execute arbitrary commands on the server and, under certain conditions, may also be exploited by unauthenticated attackers. This vulnerability stems from weak regex validation in the cleanDangerousTwig method. This vulnerability is fixed in 1.8.0-beta.27.
Do I need to act?
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41.4% chance of exploitation in next 30 days
EPSS score — higher than 59% of all CVEs
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Not on CISA KEV list
No confirmed active exploitation reported to CISA
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Patch status unknown
Check vendor advisories for fix availability and mitigation guidance
8
CVSS 8.8/10
High
NETWORK
/ LOW complexity
Affected Products (20)
Affected Vendors
69
/ 100
high-risk
Severity
30/34 · Critical
Exploitability
17/34 · Moderate
Exposure
22/34 · High