CVE-2026-10821

{"id": "CVE-2026-10821", "cveTags": [], "metrics": {"ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-10821", "role": "CISA Coordinator", "options": [{"exploitation": "poc"}, {"automatable": "no"}, {"technicalImpact": "total"}], "version": "2.0.3", "timestamp": "2026-09-02T14:48:28.117001Z"}}], "cvssMetricV31": [{"type": "Secondary", "source": "contact@wpscan.com", "cvssData": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 6.6, "attackVector": "NETWORK", "baseSeverity": "MEDIUM", "vectorString": "CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:U/C:H/I:H/A:H", "integrityImpact": "HIGH", "userInteraction": "NONE", "attackComplexity": "HIGH", "availabilityImpact": "HIGH", "privilegesRequired": "HIGH", "confidentialityImpact": "HIGH"}, "impactScore": 5.9, "exploitabilityScore": 0.7}]}, "affected": [{"source": "contact@wpscan.com", "affectedData": [{"vendor": "Unknown", "product": "Yoast SEO Premium", "versions": [{"status": "affected", "version": "0", "lessThan": "27.6.1", "versionType": "semver"}], "defaultStatus": "unaffected"}]}], "published": "2026-09-02T15:17:37.267", "references": [{"url": "https://wpscan.com/vulnerability/2ddd8362-7248-48de-aab9-74c70e7d5dd6/", "source": "contact@wpscan.com"}, {"url": "https://yoast.com/yoast-seo-premium-may-26-2026/", "source": "contact@wpscan.com"}], "vulnStatus": "Deferred", "weaknesses": [{"type": "Secondary", "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "description": [{"lang": "en", "value": "CWE-74"}]}], "descriptions": [{"lang": "en", "value": "The Yoast SEO Premium WordPress plugin before 27.6.1 does not sanitize control characters from redirect origins before writing them to the site's Apache configuration file when the file-based redirect mode is enabled, and the redirect-creation endpoint is reachable by users with only Author-level access. This allows such users to inject arbitrary newline-delimited Apache directives into the root .htaccess file. On Apache servers that honour PHP directives, the injection can be chained with the user's own media upload (a polyglot image carrying a PHP payload) and an auto_prepend_file directive to achieve Remote Code Execution."}], "lastModified": "2026-09-03T17:50:37.690", "sourceIdentifier": "contact@wpscan.com"}