EUVD-2026-67837
GHSA-j8rr-2wmh-q2h8
Severity by source
CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:N/VA:N/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-reachable API requires a valid token (PR:L); only confidentiality is confirmed impacted via file read; conditional RCE excluded from base score absent a confirmed write primitive.
Primary rating from Vendor (VulnCheck).
CVSS VectorVendor: VulnCheck
CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:N/VA:N/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
Flextype CMS through v1.0.0-dev contains an expression language injection vulnerability that allows authenticated attackers with a valid API token to read arbitrary files by passing unsanitized user-supplied input to the Symfony ExpressionLanguage engine via the POST /api/v1/query endpoint. Attackers can leverage exposed application objects including filesystem() and serializers() within the evaluation scope to read arbitrary server files and achieve conditional remote code execution if a PHP file can be placed on disk through a secondary vector.
AnalysisAI
Expression language injection in Flextype CMS through v1.0.0-dev enables authenticated API token holders to read arbitrary server-side files by passing unsanitized input to the Symfony ExpressionLanguage engine via POST /api/v1/query. The evaluation scope exposes application objects including filesystem() and serializers(), making sensitive file disclosure (credentials, configuration files, secrets) straightforward for any token-bearing attacker. …
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | Exploitation requires possession of a valid Flextype CMS API token (PR:L per CVSS 4.0 vector), restricting the immediate attacker pool to authenticated users or those who have compromised a token. … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | The CVSS 4.0 score of 7.1 (AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:N/VA:N) correctly captures the primary confirmed impact - high confidentiality loss - while the PR:L metric accurately reflects that a valid API token is required, meaningfully narrowing the exploitable population compared to unauthenticated flaws. … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in. |
| Exploit Scenario | Full exploit scenario with step-by-step reproduction available after sign-in. |
| Remediation | No vendor-released patch has been identified at time of analysis - the affected version is a development release (v1.0.0-dev) and no fix version appears in the GitHub issue or VulnCheck advisory. … Detailed patch versions, workarounds, and compensating controls in full report. |
Recommended ActionAI
Within 24 hours, inventory all Flextype CMS API tokens in production, audit their permission scope and expiration settings, and review API access logs for suspicious POST requests to /api/v1/query endpoint; immediately revoke any overly permissive tokens. …
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External POC / Exploit Code
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