EUVD-2026-87943
GHSA-mxrg-842r-h599
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
Remote low-complexity attack needing only a self-registered shop account (PR:L, borderline PR:N) and no user interaction; misattribution to an admin yields full confidentiality, integrity, and availability impact within the same application (S:U).
Primary rating from Vendor (vulncheck).
CVSS VectorVendor: vulncheck
Lifecycle Timeline
5DescriptionCVE.org
Sylius versions before 1.12.25, 1.13.17, 1.14.20, 2.1.16, and 2.2.9 fail to include firewall identification in JWT tokens issued by separate Admin and Shop API endpoints. Attackers can register a shop customer account using an administrator's email address and obtain a token that the Admin API resolves to that administrator, granting full administrative access.
Articles & Coverage 1
AnalysisAI
JWT audience confusion in Sylius (before 1.12.25, 1.13.17, 1.14.20, 2.1.16, and 2.2.9) allows a self-registered shop customer to escalate to full administrator access. Because tokens issued by the Shop API omit any firewall/audience identifier, an attacker who registers a shop account using an existing administrator's email address receives a token that the Admin API resolves to that administrator, granting complete administrative control (CVSS 3.1 8.7, PR:L, C/I/A:H). …
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | Requires that the Sylius application expose both the Shop API and Admin API JWT firewalls (default configuration) and that self-service shop-customer registration be available. … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | This is a genuine high-priority privilege-escalation flaw, not an inflated CVSS score. … 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 | Upgrade to a patched release: 1.12.25, 1.13.17, 1.14.20, 2.1.16, or 2.2.9 (the tag v2.2.9 is published at https://github.com/Sylius/Sylius/releases/tag/v2.2.9, and the fix landed via PR #19213 and commit cdfb672a4d174eb2c73159b25cf5b5f44088f45c). … Detailed patch versions, workarounds, and compensating controls in full report. |
Recommended ActionAI
Within 24 hours, inventory every Sylius deployment, confirm whether both Shop and Admin JWT firewalls and self-service shop registration are enabled, and where possible immediately disable public registration or restrict the Admin API to trusted networks; additionally, rotate JWT signing keys/passphrases and force re-authentication of all administrator accounts, and review recent registrations for accounts created with existing administrator email addresses. …
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External POC / Exploit Code
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