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    2 vulnerabilities found for Yoast SEO Premium by Unknown

    CVE-2026-10821 (GCVE-0-2026-10821)

    Vulnerability from nvd – Published: 2026-09-02 14:16 – Updated: 2026-09-02 14:57
    VLAI
    Title
    Yoast SEO Premium < 27.6.1 - Author+ Arbitrary .htaccess Directive Injection to RCE
    Summary
    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.
    Severity
    6.6 (Medium)
    CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:U/C:H/I:H/A:H
    SSVC
    Exploitation: poc Automatable: no Technical Impact: total
    CISA Coordinator · CISA-ADP (v2.0.3)
    Decision recorded 2026-09-02 14:48 UTC
    CWE
    Assigner
    References
    Impacted products
    Vendor Product Version
    Unknown Yoast SEO Premium Affected: 0 , < 27.6.1 (semver)
    		Create a notification for this product.
    Credits
    Tin Pham (TF1T) Trong Pham (dtro) Hao Ngo WPScan
    Show details on NVD website
    To clipboard 

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                "id": "CVE-2026-10821",
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                "role": "CISA Coordinator",
                "timestamp": "2026-09-02T14:48:28.117001Z",
                "version": "2.0.3"
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        "providerMetadata": {
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          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      }
    ],
    "cna": {
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        {
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          "product": "Yoast SEO Premium",
          "vendor": "Unknown",
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            {
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            }
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        "engine": "WPScan CVE Generator"
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    "dateReserved": "2026-06-04T07:41:54.109Z",
    "dateUpdated": "2026-09-02T14:57:38.690Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
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    CVE-2026-10821 (GCVE-0-2026-10821)

    Vulnerability from cvelistv5 – Published: 2026-09-02 14:16 – Updated: 2026-09-02 14:57
    VLAI
    Title
    Yoast SEO Premium < 27.6.1 - Author+ Arbitrary .htaccess Directive Injection to RCE
    Summary
    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.
    Severity
    6.6 (Medium)
    CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:U/C:H/I:H/A:H
    SSVC
    Exploitation: poc Automatable: no Technical Impact: total
    CISA Coordinator · CISA-ADP (v2.0.3)
    Decision recorded 2026-09-02 14:48 UTC
    CWE
    Assigner
    References
    Impacted products
    Vendor Product Version
    Unknown Yoast SEO Premium Affected: 0 , < 27.6.1 (semver)
    		Create a notification for this product.
    Credits
    Tin Pham (TF1T) Trong Pham (dtro) Hao Ngo WPScan
    Show details on NVD website
    To clipboard 

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                  },
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                  },
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                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2026-09-02T14:48:28.117001Z",
                "version": "2.0.3"
              },
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            }
          }
        ],
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        ],
        "providerMetadata": {
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