CVE-2020-26239

{"id": "CVE-2020-26239", "metrics": {"cvssMetricV2": [{"type": "Primary", "source": "nvd@nist.gov", "cvssData": {"version": "2.0", "baseScore": 3.5, "accessVector": "NETWORK", "vectorString": "AV:N/AC:M/Au:S/C:N/I:P/A:N", "authentication": "SINGLE", "integrityImpact": "PARTIAL", "accessComplexity": "MEDIUM", "availabilityImpact": "NONE", "confidentialityImpact": "NONE"}, "acInsufInfo": false, "impactScore": 2.9, "baseSeverity": "LOW", "obtainAllPrivilege": false, "exploitabilityScore": 6.8, "obtainUserPrivilege": false, "obtainOtherPrivilege": false, "userInteractionRequired": true}], "cvssMetricV31": [{"type": "Primary", "source": "nvd@nist.gov", "cvssData": {"scope": "CHANGED", "version": "3.1", "baseScore": 5.4, "attackVector": "NETWORK", "baseSeverity": "MEDIUM", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N", "integrityImpact": "LOW", "userInteraction": "REQUIRED", "attackComplexity": "LOW", "availabilityImpact": "NONE", "privilegesRequired": "LOW", "confidentialityImpact": "LOW"}, "impactScore": 2.7, "exploitabilityScore": 2.3}, {"type": "Secondary", "source": "security-advisories@github.com", "cvssData": {"scope": "CHANGED", "version": "3.1", "baseScore": 7.6, "attackVector": "NETWORK", "baseSeverity": "HIGH", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:H/A:N", "integrityImpact": "HIGH", "userInteraction": "REQUIRED", "attackComplexity": "LOW", "availabilityImpact": "NONE", "privilegesRequired": "LOW", "confidentialityImpact": "LOW"}, "impactScore": 4.7, "exploitabilityScore": 2.3}]}, "published": "2020-11-23T19:15:11.117", "references": [{"url": "https://github.com/ScratchAddons/ScratchAddons/blob/a471893df403f86c9182970678175d4772a0690c/addons/more-links/userscript.js#L15", "tags": ["Third Party Advisory"], "source": "security-advisories@github.com"}, {"url": "https://github.com/ScratchAddons/ScratchAddons/commit/b9a52d6532c8514254c7cc1d8e18710dbedc41ff", "tags": ["Patch", "Third Party Advisory"], "source": "security-advisories@github.com"}, {"url": "https://github.com/ScratchAddons/ScratchAddons/releases/tag/v1.3.2", "tags": ["Release Notes", "Third Party Advisory"], "source": "security-advisories@github.com"}, {"url": "https://github.com/ScratchAddons/ScratchAddons/security/advisories/GHSA-6qfq-px3r-xj4p", "tags": ["Patch", "Third Party Advisory"], "source": "security-advisories@github.com"}], "vulnStatus": "Analyzed", "weaknesses": [{"type": "Primary", "source": "security-advisories@github.com", "description": [{"lang": "en", "value": "CWE-79"}]}], "descriptions": [{"lang": "en", "value": "Scratch Addons is a WebExtension that supports both Chrome and Firefox. Scratch Addons before version 1.3.2 is vulnerable to DOM-based XSS. If the victim visited a specific website, the More Links addon of the Scratch Addons extension used incorrect regular expression which caused the HTML-escaped values to be unescaped, leading to XSS. Scratch Addons version 1.3.2 fixes the bug. The extension will be automatically updated by the browser. More Links addon can be disabled via the option of the extension."}, {"lang": "es", "value": "Scratch Addons es una WebExtension compatible con Chrome y Firefox. Los complementos de Scratch anteriores a versi\u00f3n 1.3.2, son vulnerables a un ataque de tipo XSS basado en DOM. Si la v\u00edctima visit\u00f3 un sitio web espec\u00edfico, el complemento More Links de la extensi\u00f3n Scratch Addons utiliz\u00f3 una expresi\u00f3n regular incorrecta que caus\u00f3 que los valores de escape HTML no sean escapados, conllevando a un XSS. La versi\u00f3n 1.3.2 de Scratch Addons corrige el error. El navegador actualizar\u00e1 autom\u00e1ticamente la extensi\u00f3n. M\u00e1s addon de Enlaces pueden ser desactivados por medio de la opci\u00f3n de la extensi\u00f3n"}], "lastModified": "2020-12-03T13:43:40.090", "configurations": [{"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:a:scratchaddons:scratch_addons:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "CFD34A4F-D4C1-4ECE-B318-AA34A1DB7A8D", "versionEndExcluding": "1.3.2"}], "operator": "OR"}]}], "sourceIdentifier": "security-advisories@github.com"}