GHSA-pp9r-ppc4-25w4: Duplicate Advisory Grav: FlexDirectory::dynamicDataField() Executes Arbitrary Callables Vulnerability
HIGHGHSA-pp9r-ppc4-25w4 is a HIGH (CVSS 8.8) grav: flexdirectory::dynamicdatafield() executes arbitrary callables vulnerability (CWE-470: Use of Externally-Controlled Input to Select Classes or Code ('Unsafe Reflection')) affecting Duplicate Advisory libraries in the Packagist ecosystem. The issue involves grav: flexdirectory::dynamicdatafield() executes arbitrary callables from blueprint data with no validation. Remediation is available in the latest vendor maintenance releases.
GHSA-pp9r-ppc4-25w4 at a Glance
Security Impact
CVSS: 8.8
The security impact metrics below are parsed directly from the CVSS v3.1 vector string (CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H).
How to Fix GHSA-pp9r-ppc4-25w4
To remediate this vulnerability, upgrade all affected Duplicate Advisory dependencies to a patched release. Both direct and transitive dependencies should be checked, as frameworks or security libraries may pull in vulnerable versions transitively.
Upgrade getgrav/grav to Latest secure releaseRun the following command in your project directory to verify that all resolved dependencies use the patched release:
inspect dependencies for getgrav/gravHow to Check if You Are Affected
To determine whether your application is affected by GHSA-pp9r-ppc4-25w4, inspect your project dependencies for Duplicate Advisory:
inspect dependencies for getgrav/gravAnalyze the terminal output to locate any version of Duplicate Advisory in your dependency tree. If any resolved version matches the vulnerable ranges listed in the table below (for example, versions earlier than the patched release), your application is affected.
Note: Verify declared build manifests and deployed runtime container environments.
Technical Details
Vulnerability Mechanism & Technical Analysis
This vulnerability is classified under CWE-470: Use of Externally-Controlled Input to Select Classes or Code ('Unsafe Reflection'), where the product uses external input with reflection to select which classes or code to use, but it does not sufficiently prevent the input from selecting improper classes or code. In Duplicate Advisory, software state validation or input boundaries are circumvented during processing. Review the official source advisory statement below for specific affected components, classes, and reproduction details.
Source Advisory Statement
GHSA-pp9r-ppc4-25w4 Affected Duplicate Advisory Versions
1 component(s)| Product / Package | Ecosystem | Affected Versions | Fixed Version |
|---|---|---|---|
|
getgrav/grav
|
Packagist |
≥ 1.7.0
|
|
References
Frequently Asked Questions
What is GHSA-pp9r-ppc4-25w4?
Which Duplicate Advisory versions are affected?
What version fixes GHSA-pp9r-ppc4-25w4?
Is getgrav/grav affected?
What is the CVSS score of GHSA-pp9r-ppc4-25w4?
What CWE is associated with GHSA-pp9r-ppc4-25w4?
How can I check Packagist dependencies for GHSA-pp9r-ppc4-25w4?
Machine-readable OSV JSON
OSV v1.5 Schema
{
"schema_version" : "1.4.0",
"id" : "GHSA-pp9r-ppc4-25w4",
"modified" : "2026-09-17T17:15:06Z",
"published" : "2026-07-23T12:32:30Z",
"withdrawn" : "2026-09-17T17:15:05Z",
"aliases" : [ ],
"summary" : "Duplicate Advisory: Grav: FlexDirectory::dynamicDataField() executes arbitrary callables from blueprint data with no validation",
"details" : "### Duplicate Advisory\nThis advisory has been withdrawn because it is a duplicate of GHSA-c4wf-2xxc-68qm. This link is maintained to preserve external references.\n\n### Original Description\nGrav versions >= 1.7.0 and before 2.0.9 contain a remote code execution vulnerability. FlexDirectory::dynamicDataField() resolves blueprint data-*@: directives by calling call_user_func_array() on attacker-influenced input, validating only that the target is callable (is_callable()) without restricting dangerous functions such as exec, system, passthru, or shell_exec. Because FlexDirectory registers this handler for every Flex directory, it bypasses the validation added to Blueprint::dynamicData() in 2.0.7 (GHSA-fj2p-qj2f-74v5). Any authenticated user with create or update permission on any Flex-based directory (Flex Users, Flex Pages, Flex Objects, or custom Flex types) can execute arbitrary shell commands on the server.",
"severity" : [ {
"type" : "CVSS_V3",
"score" : "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H"
}, {
"type" : "CVSS_V4",
"score" : "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"
} ],
"affected" : [ {
"package" : {
"ecosystem" : "Packagist",
"name" : "getgrav/grav"
},
"ranges" : [ {
"type" : "ECOSYSTEM",
"events" : [ {
"introduced" : "1.7.0"
} ]
} ],
"database_specific" : {
"last_known_affected_version_range" : "< 2.0.9"
}
} ],
"references" : [ {
"type" : "WEB",
"url" : "https://github.com/getgrav/grav/security/advisories/GHSA-c4wf-2xxc-68qm"
}, {
"type" : "ADVISORY",
"url" : "https://nvd.nist.gov/vuln/detail/CVE-2026-65608"
}, {
"type" : "WEB",
"url" : "https://github.com/getgrav/grav/commit/fae9e1bf2c40ce0b50d0dfce647aaa1d22f98969"
}, {
"type" : "WEB",
"url" : "https://www.vulncheck.com/advisories/grav-before-remote-code-execution-via-flexdirectory"
} ],
"database_specific" : {
"cwe_ids" : [ "CWE-470" ],
"severity" : "HIGH",
"github_reviewed" : true,
"github_reviewed_at" : "2026-09-17T17:15:05Z",
"nvd_published_at" : "2026-07-23T12:18:47Z"
}
}