EUVD-2026-71032
GHSA-fcgm-pp78-h237
Severity by source
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:H/VI:L/VA:N/SC:H/SI:L/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
Unauthenticated network endpoint (AV:N/PR:N), one user interaction required (UI:R), scope changes to API origin granting high confidentiality impact on authenticated session data (S:C/C:H).
Primary rating from Vendor (VulnCheck).
CVSS VectorVendor: VulnCheck
Lifecycle Timeline
4DescriptionCVE.org
OpenPanel before 2.3.0 contains a cross-site scripting vulnerability in the unauthenticated favicon proxy endpoint GET /misc/favicon that allows remote attackers to execute scripts by supplying an SVG file URL. Attackers can host malicious SVG files with embedded scripts that execute in the victim's browser on the API origin, enabling same-origin credentialed requests to authenticated endpoints.
AnalysisAI
Unauthenticated XSS in OpenPanel before 2.3.0 allows remote attackers to execute arbitrary JavaScript in a victim's browser by supplying a malicious SVG URL to the unprotected favicon proxy endpoint GET /misc/favicon. Because the SVG is served from the OpenPanel API origin, embedded scripts inherit same-origin context, enabling the attacker's code to issue credentialed requests against authenticated admin API endpoints on the victim's behalf. …
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | The /misc/favicon endpoint is unauthenticated and exposed to the network by default in all OpenPanel installations before 2.3.0 - no special configuration or feature flag is required to be vulnerable. … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | The CVSS 4.0 score of 8.4 (AV:N/AC:L/AT:N/PR:N/UI:P/VC:H/VI:L/VA:N/SC:H/SI:L/SA:N) accurately reflects the threat model. … 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 | Vendor-released patch: OpenPanel 2.3.0, which remediates the unauthenticated XSS in the favicon proxy endpoint. … Detailed patch versions, workarounds, and compensating controls in full report. |
Recommended ActionAI
Within 24 hours, inventory all OpenPanel deployments to identify affected versions (prior to 2.3.0) and implement network-level restrictions on the GET /misc/favicon endpoint using firewall rules or WAF policies. …
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An issue in Open Panel v.0.3.4 allows a remote attacker to escalate privileges via the Fix Permissions function. Rated h
An issue in Open Panel v.0.3.4 allows a remote attacker to escalate privileges via the Fix Permissions function. Rated m
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Same weakness CWE-79 – Cross-site Scripting (XSS)
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External POC / Exploit Code
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