Grav is a file-based Web platform. Prior to 1.8.0-beta.27, there is an IDOR (Insecure Direct Object Reference) vulnerability in the Grav CMS Admin Panel which allows low-privilege users to access sensitive information from other accounts. Although direct account takeover is not possible, admin email addresses and other metadata can be exposed, increasing the risk of phishing, credential stuffing, and social engineering. This vulnerability is fixed in 1.8.0-beta.27.
CVE-2025-66306
This medium-severity CVE scores 6.5 under NVD CVSS v3. EPSS exploit probability: 0.3%, top 82% 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).
- Lower severity and no public exploit yet
No vendor fix yet — apply a workaround or compensating control (WAF / firewall / segmentation) and watch for a patch.
- CVSS v3
- 6.5
- EG Score
- 6.5(medium)
- EG Risk
- 45(Track)EG Risk 45/100SSVC: Track
EG Risk is EchelonGraph's 0–100 priority score: it fuses intrinsic severity with real-world exploitation and automatability so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner. Distinct from the 0–10 EG Score (severity).
How it’s computedSeverity65% × 45%Exploitation40% × 40%Automatability0% × 15%Action: Routine — remediate on your standard cadence. - EPSS PROB
- 0%
- EPSS %ILE
- 18%
- KEV
- Not listed
Published
December 1, 2025
Last Modified
June 17, 2026
References (3)
- security-advisories@githubhttps://github.com/getgrav/grav/commit/b7e1958a6e807ac14919447b60e5204a2ea77f62
- security-advisories@githubhttps://github.com/getgrav/grav/security/advisories/GHSA-4cwq-j7jv-qmwg
- 134c704f-9b21-4f2e-91b3-4a467353bcc0https://github.com/getgrav/grav/security/advisories/GHSA-4cwq-j7jv-qmwg
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 12× in last 7d / 47× 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.
- 2026-07-26 14:54 UTCEPSS rescore
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- 2026-07-23 14:11 UTCOSV refresh
- 2026-07-23 03:01 UTCEG score recompute▲ 2.20
- 2026-07-22 14:08 UTCEPSS rescore
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- 2026-07-06 09:11 UTCOSV refresh
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- 2026-06-24 10:01 UTCNVD updateCVSS v3 → 6.5
- 2026-06-23 21:32 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
- 2026-05-29 18:39 UTCEG score recompute
- 2026-05-29 13:44 UTCEPSS rescore
Frequently asked(5)
What is CVE-2025-66306?
When was CVE-2025-66306 disclosed?
Is CVE-2025-66306 actively exploited?
What is the CVSS score of CVE-2025-66306?
How do I remediate CVE-2025-66306?
Dependency Blast Radius
See which npm, PyPI, Go, and Maven packages are affected by CVE-2025-66306
Is Your Infrastructure Affected by CVE-2025-66306?
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