{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-33386", "assignerOrgId": "4bb8329e-dd38-46c1-aafb-9bf32bcb93c6", "state": "PUBLISHED", "assignerShortName": "CERT-PL", "dateReserved": "2026-03-19T10:45:47.736Z", "datePublished": "2026-05-29T15:12:20.613Z", "dateUpdated": "2026-05-29T17:31:36.344Z"}, "containers": {"cna": {"affected": [{"defaultStatus": "unknown", "product": "QuickCMS", "vendor": "OpenSolution", "versions": [{"lessThanOrEqual": "6.8", "status": "affected", "version": "0", "versionType": "semver"}]}], "credits": [{"lang": "en", "type": "finder", "value": "Jakub Lipi\u0144ski"}], "descriptions": [{"lang": "en", "supportingMedia": [{"base64": false, "type": "text/html", "value": "<div>QuickCMS is vulnerable to Cross-Site Scripting (XSS) through its insecure HTTP-based plugin\u2011fetching mechanism. A malicious attacker can perform a Man\u2011in\u2011the\u2011Middle (MITM) attack by impersonating the opensolution.org server and serving arbitrary HTML or JavaScript at the plugin list endpoint. When a user accesses the plugin page, the malicious content is automatically fetched, rendered, and executed.</div><br>This issue was fixed in a patch to version 6.8 published on 15.05.2026, deployments without this patch are still vulnerable.<br><br>"}], "value": "QuickCMS is vulnerable to Cross-Site Scripting (XSS) through its insecure HTTP-based plugin\u2011fetching mechanism. A malicious attacker can perform a Man\u2011in\u2011the\u2011Middle (MITM) attack by impersonating the opensolution.org server and serving arbitrary HTML or JavaScript at the plugin list endpoint. When a user accesses the plugin page, the malicious content is automatically fetched, rendered, and executed.\n\n\nThis issue was fixed in a patch to version 6.8 published on 15.05.2026, deployments without this patch are still vulnerable."}], "impacts": [{"capecId": "CAPEC-63", "descriptions": [{"lang": "en", "value": "CAPEC-63: Cross-Site Scripting (XSS)"}]}], "metrics": [{"cvssV4_0": {"Automatable": "NOT_DEFINED", "Recovery": "NOT_DEFINED", "Safety": "NOT_DEFINED", "attackComplexity": "LOW", "attackRequirements": "PRESENT", "attackVector": "ADJACENT", "baseScore": 2.3, "baseSeverity": "LOW", "privilegesRequired": "NONE", "providerUrgency": "NOT_DEFINED", "subAvailabilityImpact": "NONE", "subConfidentialityImpact": "LOW", "subIntegrityImpact": "LOW", "userInteraction": "NONE", "valueDensity": "NOT_DEFINED", "vectorString": "CVSS:4.0/AV:A/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N", "version": "4.0", "vulnAvailabilityImpact": "NONE", "vulnConfidentialityImpact": "NONE", "vulnIntegrityImpact": "NONE", "vulnerabilityResponseEffort": "NOT_DEFINED"}, "format": "CVSS", "scenarios": [{"lang": "en", "value": "GENERAL"}]}], "problemTypes": [{"descriptions": [{"cweId": "CWE-79", "description": "CWE-79 Improper Neutralization of Input During Web Page Generation (XSS or 'Cross-site Scripting')", "lang": "en", "type": "CWE"}]}], "providerMetadata": {"orgId": "4bb8329e-dd38-46c1-aafb-9bf32bcb93c6", "shortName": "CERT-PL", "dateUpdated": "2026-05-29T15:12:20.613Z"}, "references": [{"tags": ["third-party-advisory"], "url": "https://cert.pl/posts/2026/05/CVE-2026-33384/"}, {"tags": ["product"], "url": "https://opensolution.org/home.html"}], "source": {"discovery": "EXTERNAL"}, "title": "XSS in QuickCMS", "x_generator": {"engine": "Vulnogram 0.2.0"}}, "adp": [{"metrics": [{"other": {"type": "ssvc", "content": {"timestamp": "2026-05-29T17:31:26.965769Z", "id": "CVE-2026-33386", "options": [{"Exploitation": "none"}, {"Automatable": "no"}, {"Technical Impact": "partial"}], "role": "CISA Coordinator", "version": "2.0.3"}}}], "title": "CISA ADP Vulnrichment", "providerMetadata": {"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2026-05-29T17:31:36.344Z"}}]}}

{}

{"cveTags": [], "descriptions": [{"lang": "en", "value": "QuickCMS is vulnerable to Cross-Site Scripting (XSS) through its insecure HTTP-based plugin\u2011fetching mechanism. A malicious attacker can perform a Man\u2011in\u2011the\u2011Middle (MITM) attack by impersonating the opensolution.org server and serving arbitrary HTML or JavaScript at the plugin list endpoint. When a user accesses the plugin page, the malicious content is automatically fetched, rendered, and executed.\n\n\nThis issue was fixed in a patch to version 6.8 published on 15.05.2026, deployments without this patch are still vulnerable."}], "id": "CVE-2026-33386", "lastModified": "2026-05-29T16:29:11.350", "metrics": {"cvssMetricV40": [{"cvssData": {"Automatable": "NOT_DEFINED", "Recovery": "NOT_DEFINED", "Safety": "NOT_DEFINED", "attackComplexity": "LOW", "attackRequirements": "PRESENT", "attackVector": "ADJACENT", "availabilityRequirement": "NOT_DEFINED", "baseScore": 2.3, "baseSeverity": "LOW", "confidentialityRequirement": "NOT_DEFINED", "exploitMaturity": "NOT_DEFINED", "integrityRequirement": "NOT_DEFINED", "modifiedAttackComplexity": "NOT_DEFINED", "modifiedAttackRequirements": "NOT_DEFINED", "modifiedAttackVector": "NOT_DEFINED", "modifiedPrivilegesRequired": "NOT_DEFINED", "modifiedSubAvailabilityImpact": "NOT_DEFINED", "modifiedSubConfidentialityImpact": "NOT_DEFINED", "modifiedSubIntegrityImpact": "NOT_DEFINED", "modifiedUserInteraction": "NOT_DEFINED", "modifiedVulnAvailabilityImpact": "NOT_DEFINED", "modifiedVulnConfidentialityImpact": "NOT_DEFINED", "modifiedVulnIntegrityImpact": "NOT_DEFINED", "privilegesRequired": "NONE", "providerUrgency": "NOT_DEFINED", "subAvailabilityImpact": "NONE", "subConfidentialityImpact": "LOW", "subIntegrityImpact": "LOW", "userInteraction": "NONE", "valueDensity": "NOT_DEFINED", "vectorString": "CVSS:4.0/AV:A/AC:L/AT:P/PR:N/UI:N/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", "version": "4.0", "vulnAvailabilityImpact": "NONE", "vulnConfidentialityImpact": "NONE", "vulnIntegrityImpact": "NONE", "vulnerabilityResponseEffort": "NOT_DEFINED"}, "source": "cvd@cert.pl", "type": "Secondary"}]}, "published": "2026-05-29T16:16:25.560", "references": [{"source": "cvd@cert.pl", "url": "https://cert.pl/posts/2026/05/CVE-2026-33384/"}, {"source": "cvd@cert.pl", "url": "https://opensolution.org/home.html"}], "sourceIdentifier": "cvd@cert.pl", "vulnStatus": "Deferred", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-79"}], "source": "cvd@cert.pl", "type": "Primary"}]}

{}

{"created": "2026-05-29T17:45:04.428817+00:00", "updated": "2026-05-29T17:45:04.428836+00:00", "vendors": []}