Grav is a file-based Web platform. Prior to 1.8.0-beta.27, a user with admin panel access and permissions to create or edit pages in Grav CMS can enable Twig processing in the page frontmatter. By injecting malicious Twig expressions, the user can escalate their privileges to admin or execute arbitrary system commands via the scheduler API. This results in both Privilege Escalation (PE) and Remote Code Execution (RCE) vulnerabilities. This vulnerability is fixed in 1.8.0-beta.27.
CVE-2025-66297
This high-severity CVE scores 8.8 under NVD CVSS v3. EPSS exploit probability: 0.5%, top 35% of all CVEs by exploit prediction. GitHub Security Advisory data not yet ingested — confidence will rise once GHSA publishes (typical lag: hours to days for open-source ecosystem CVEs; never for infrastructure-only CVEs).
- High severity, but no confirmed exploitation yet
No vendor fix yet — apply a workaround or compensating control (WAF / firewall / segmentation) and watch for a patch.
- CVSS v3
- 8.8
- EG Score
- 8.8(medium)
- EPSS
- 49.3%
- KEV
- Not listed
Published
December 1, 2025
Last Modified
June 17, 2026
References (2)
- security-advisories@githubhttps://github.com/getgrav/grav/commit/e37259527d9c1deb6200f8967197a9fa587c6458
- security-advisories@githubhttps://github.com/getgrav/grav/security/advisories/GHSA-858q-77wx-hhx6
Affected Packages
(1 across 1 ecosystem)
Packagist(1)
| Package | Vulnerable range | Fixed in | Dependents |
|---|---|---|---|
| getgrav/grav | 0.8.0 ... 1.8.0-beta.9 (311 versions) | 1.8.0-beta.27 | — |
Weakness Classification(1)
MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.
Data Freshness Timeline
(refreshed 9× in last 7d / 44× in last 30d)
Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. Most recent first.
- 2026-07-22 14:08 UTCEPSS rescore
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- 2026-07-06 09:11 UTCOSV refresh
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- 2026-06-18 17:52 UTCEPSS rescore
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- 2026-06-17 21:05 UTCOSV refresh
- 2026-06-17 17:52 UTCEPSS rescore
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- 2026-05-31 00:16 UTCEPSS rescore
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- 2026-05-29 18:39 UTCEG score recompute
- 2026-05-29 13:44 UTCEPSS rescore
Frequently asked(5)
What is CVE-2025-66297?
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Dependency Blast Radius
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