EUVD-2026-65217
GHSA-3625-697m-q29v
Severity by source
CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/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
Network-accessible, low-privilege exploitation escaping the web application sandbox to execute OS commands justifies PR:L, S:C, and full C/I/A impact.
Primary rating from Vendor (VulnCheck).
CVSS VectorVendor: VulnCheck
CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/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
Lifecycle Timeline
3DescriptionCVE.org
The Grav Email plugin (getgrav/grav-plugin-email) before 4.2.2 renders page-editor-controlled Email action parameters as unsandboxed Twig templates. An authenticated remote user with only api.access and api.pages.write permissions can place a Twig expression in header.form.process.email.body, publish the page, and submit the form to execute an arbitrary operating-system command as the account running PHP.
AnalysisAI
Server-Side Template Injection in the Grav Email plugin (getgrav/grav-plugin-email) before 4.2.2 permits authenticated remote code execution on the host running PHP. Any account holding only api.access and api.pages.write permissions - typical content-editor roles - can embed a Twig payload in the header.form.process.email.body Email action parameter, publish the page, and trigger arbitrary OS command execution by submitting the associated form. …
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | Exploitation requires an authenticated session with both api.access and api.pages.write permissions - these are content-editor-level roles, not administrator roles, meaning the privilege bar is intentionally low for many Grav multi-user deployments. … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | The CVSS 4.0 score of 8.7 reflects a network-accessible, low-complexity attack with no user interaction required, yielding high confidentiality, integrity, and availability impact on the vulnerable system. … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in. |
| Exploit Scenario | A malicious content editor with api.access and api.pages.write permissions creates a new Grav page and sets header.form.process.email.body to a Twig payload such as {{ ['id'] | map('system') | join }}, then publishes the page. Upon form submission - which the attacker can trigger themselves or socially engineer - the Email plugin renders the body field as an unsandboxed Twig template, executing the OS command as the PHP process user. … |
| Remediation | Upgrade the Grav Email plugin to version 4.2.2 or later, which addresses unsandboxed Twig rendering of Email action parameters, as documented in GitHub Security Advisory GHSA-gh8j-q67c-j53f (https://github.com/getgrav/grav/security/advisories/GHSA-gh8j-q67c-j53f). … Detailed patch versions, workarounds, and compensating controls in full report. |
Recommended ActionAI
Within 24 hours, conduct an inventory of all Grav CMS instances to identify those running the email plugin before version 4.2.2, and immediately revoke api.access and api.pages.write permissions from all users except essential administrators. …
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