{"id":"CVE-2026-76203","state":"PUBLISHED","title":"CSS sanitizer bypass in Pentestify report themes allows forced outbound requests","description":"Incorrect Behavior Order: Validate Before Canonicalize in the report theme CSS sanitizer\nin maalfer Pentestify 1.2.0 through 2.3.2 allows an authenticated user to force outbound\nHTTP requests from other users' browsers, disclosing their IP address and User-Agent, via\nCSS hex escapes that reconstruct the url() function and evade the sanitizer blocklist","publishedAt":"2026-08-19T14:23:17.894Z","updatedAt":"2026-08-21T16:18:44.594Z","severity":{"score":5.1,"label":"Medium","version":"4.0","vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:P/VC:N/VI:L/VA:N/SC:L/SI:L/SA:N","source":"Secur0"},"assigner":"Secur0","products":["maalfer Pentestify"],"affected":[{"vendor":"maalfer","product":"Pentestify","defaultStatus":"unaffected","versions":[{"version":"1.2.0","status":"affected","lessThan":"1ed1aad","versionType":"custom"}],"repo":"https://github.com/ccyl13/Pentestify","modules":["report themes","application settings"],"programFiles":["backend/schemas.py","js/app.js"]}],"references":["https://github.com/ccyl13/Pentestify/commit/1ed1aadadb02e959af470aac9958462048f7f5f5","https://secur0.com/en/cna/cve-list/cve-2026-76203-css-sanitizer-bypass-pentestify-report-themes"],"weaknesses":["CWE-180"],"ingestedAt":"2026-10-29T20:12:58.252Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/76xxx/CVE-2026-76203.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-76203","state":"PUBLISHED","datePublished":"2026-08-19T14:23:17.894Z","dateUpdated":"2026-08-21T16:18:44.594Z","assignerShortName":"Secur0","assignerOrgId":"4daa8cea-433a-44bd-9456-53b127fc289a","dateReserved":"2026-08-19T11:15:20.167Z"},"containers":{"cna":{"title":"CSS sanitizer bypass in Pentestify report themes allows forced outbound requests","descriptions":[{"lang":"en","value":"Incorrect Behavior Order: Validate Before Canonicalize in the report theme CSS sanitizer\nin maalfer Pentestify 1.2.0 through 2.3.2 allows an authenticated user to force outbound\nHTTP requests from other users' browsers, disclosing their IP address and User-Agent, via\nCSS hex escapes that reconstruct the url() function and evade the sanitizer blocklist"}],"affected":[{"vendor":"maalfer","product":"Pentestify","defaultStatus":"unaffected","versions":[{"version":"1.2.0","status":"affected","lessThan":"1ed1aad","versionType":"custom"}],"repo":"https://github.com/ccyl13/Pentestify","modules":["report themes","application settings"],"programFiles":["backend/schemas.py","js/app.js"]}],"references":[{"url":"https://github.com/ccyl13/Pentestify/commit/1ed1aadadb02e959af470aac9958462048f7f5f5","tags":["patch"]},{"url":"https://secur0.com/en/cna/cve-list/cve-2026-76203-css-sanitizer-bypass-pentestify-report-themes","tags":["technical-description"]}],"metrics":[{"format":"CVSS","scenarios":[{"lang":"en","value":"GENERAL"}],"cvssV4_0":{"attackVector":"NETWORK","attackComplexity":"LOW","attackRequirements":"NONE","privilegesRequired":"LOW","userInteraction":"PASSIVE","vulnConfidentialityImpact":"NONE","subConfidentialityImpact":"LOW","vulnIntegrityImpact":"LOW","subIntegrityImpact":"LOW","vulnAvailabilityImpact":"NONE","subAvailabilityImpact":"NONE","exploitMaturity":"NOT_DEFINED","Safety":"NOT_DEFINED","Automatable":"NOT_DEFINED","Recovery":"NOT_DEFINED","valueDensity":"NOT_DEFINED","vulnerabilityResponseEffort":"NOT_DEFINED","providerUrgency":"NOT_DEFINED","version":"4.0","baseSeverity":"MEDIUM","baseScore":5.1,"vectorString":"CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:P/VC:N/VI:L/VA:N/SC:L/SI:L/SA:N"}}],"problemTypes":[{"descriptions":[{"cweId":"CWE-180","lang":"en","description":"CWE-180 Incorrect behavior order: validate before canonicalize","type":"CWE"}]}],"providerMetadata":{"shortName":"Secur0","orgId":"4daa8cea-433a-44bd-9456-53b127fc289a","dateUpdated":"2026-08-19T14:23:17.894Z"},"datePublic":"2026-08-19T12:14:00.000Z","impacts":[{"capecId":"CAPEC-267","descriptions":[{"lang":"en","value":"CAPEC-267: Leverage Alternate Encoding"}]}],"cpeApplicability":[{"operator":"OR","nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:a:maalfer:pentestify:*:*:*:*:*:*:*:*","versionStartIncluding":"1.2.0","versionEndExcluding":"1ed1aad"}]}]}],"tags":["x_open-source"],"solutions":[{"lang":"en","value":"Tagged releases\nv2.0.0, v2.2.0, v2.3.0 and v2.3.2 shipped vulnerable. v1.1.1 is not affected\n(no custom_css field). The fix is not tagged and does not bump the version constant,\nso the upper bound cannot be stated as a version until a release is cut. It´s recommended to install from the repository.","supportingMedia":[{"type":"text/html","base64":false,"value":"Tagged releases\n<code>v2.0.0</code>, <code>v2.2.0</code>, <code>v2.3.0</code> and <code>v2.3.2</code> shipped vulnerable. <code>v1.1.1</code> is not affected\n(no <code>custom_css</code> field). The fix is not tagged and does not bump the version constant,\nso the upper bound cannot be stated as a version until a release is cut. It´s recommended to install from the repository."}]}],"credits":[{"lang":"en","value":"Manuel Martínez Casasola","type":"finder"},{"lang":"en","value":"Xoán M. Otero Jorge","type":"analyst"},{"lang":"en","value":"Secur0 CNA","type":"coordinator"},{"lang":"en","value":"Mario Álvarez Fernández","type":"remediation developer"}],"source":{"discovery":"EXTERNAL"},"x_generator":{"engine":"Vulnogram 1.0.4"}},"adp":[{"title":"CISA ADP Vulnrichment","metrics":[{"other":{"type":"ssvc","content":{"timestamp":"2026-08-21T16:04:24.906493Z","id":"CVE-2026-76203","options":[{"Exploitation":"none"},{"Automatable":"no"},{"Technical Impact":"partial"}],"role":"CISA Coordinator","version":"2.0.3"}}}],"providerMetadata":{"shortName":"CISA-ADP","orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","dateUpdated":"2026-08-21T16:18:44.594Z"}}]}}}