EUVD-2026-77240
GHSA-8pxm-r44f-qxmx
Severity by source
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:N/VI:N/VA:N/SC:L/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
Network-reachable XSS with no attacker auth, scope change to victim browser session, low C/I impact only; no availability impact.
Primary rating from Vendor (jpcert).
CVSS VectorVendor: jpcert
Lifecycle Timeline
3DescriptionCVE.org
Cross-site scripting vulnerability exists in CPSL-08P1EN. If this vulnerability is exploited, an arbitrary script may be executed on a logged-in user's web browser.
AnalysisAI
Cross-site scripting in the embedded web management interface of Contec's CPSL-08P1EN industrial network device allows a remote unauthenticated attacker to inject malicious script that executes within an authenticated operator's browser session. The CVSS 4.0 score of 5.1 (AV:N/PR:N/UI:A) reflects that while no attacker credentials are required, active interaction from a logged-in user is necessary to trigger the payload. …
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | Exploitation requires that a user currently authenticated to the CPSL-08P1EN web management interface actively loads or interacts with a page containing the attacker's injected payload - the CVSS 4.0 UI:A metric directly encodes this active-interaction prerequisite. … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | Real-world risk is moderate and tightly bounded by the user-interaction requirement. … 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 | Consult the Contec vendor security advisory (contec_security_cps_26091000_en.pdf, linked from the Contec support security page) and the JVN disclosure at https://jvn.jp/en/vu/JVNVU96551518/ for firmware update instructions. … Detailed patch versions, workarounds, and compensating controls in full report. |
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More in Cpsl 08P1En
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External POC / Exploit Code
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