Security advisory

{
  "id": "99c4365c3dfdef3ae914797cae456945db432bf2d8c79c260fa29f374caadf50",
  "url": "https://osv.dev/vulnerability/CVE-2021-42362",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "CVE-2021-42362",
    "summary": "The WordPress Popular Posts WordPress plugin is vulnerable to arbitrary file uploads due to insufficient input file type validation found in the ~/src/Image.php file which makes it possible for attackers with contributor level access and above to upload malicious files that can be used to obtain remote code execution, in versions up to and including 5.3.2.",
    "evidence": "osv:CVE-2021-42362",
    "products": [],
    "severity": "high",
    "structured": {
      "id": "CVE-2021-42362",
      "aliases": [
        "CVE-2021-42362"
      ],
      "metrics": [
        {
          "type": "CVSS_V3",
          "score": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H"
        }
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://github.com/cabrerahector/wordpress-popular-posts",
              "type": "GIT",
              "events": [
                {
                  "introduced": "0"
                },
                {
                  "last_affected": "0dacc9565fcf110c83329483aa8650f09a977285"
                },
                {
                  "fixed": "d9b274cf6812eb446e4103cb18f69897ec6fe601"
                }
              ],
              "database_specific": {
                "extracted_events": [
                  {
                    "cpe": "cpe:2.3:a:wordpress_popular_posts_project:wordpress_popular_posts:*:*:*:*:*:wordpress:*:*",
                    "range": [
                      {
                        "introduced": "0"
                      },
                      {
                        "last_affected": "5.3.2"
                      }
                    ],
                    "source": "CPE_RANGE"
                  },
                  {
                    "range": [
                      {
                        "fixed": "d9b274cf6812eb446e4103cb18f69897ec6fe601"
                      }
                    ],
                    "source": "REFERENCES_COMMIT"
                  }
                ]
              }
            }
          ],
          "versions": [
            "5.3.2",
            "5.3.1",
            "5.3.0",
            "5.2.4",
            "5.2.3",
            "5.2.2",
            "5.2.1",
            "5.2.0",
            "5.1.0",
            "5.0.2",
            "5.0.1",
            "5.0.1-beta-1",
            "5.0.0",
            "4.2.2",
            "4.2.1",
            "4.2.0",
            "4.1.2",
            "4.1.1",
            "4.1.0",
            "4.0.13",
            "4.0.12",
            "4.0.11",
            "4.0.10",
            "4.0.9",
            "4.0.8",
            "4.0.7-beta-4",
            "4.0.7-beta-3",
            "4.0.7-beta-2",
            "4.0.7-beta-1",
            "4.0.6",
            "4.0.5",
            "4.0.3",
            "4.0.2",
            "4.0.1",
            "4.0.1-beta-2",
            "4.0.1-beta-1",
            "4.0.0",
            "3.3.4-final",
            "3.3.4",
            "3.3.3",
            "3.3.2",
            "3.3.2-beta-1",
            "3.3.1",
            "3.3.0",
            "3.3.0-beta-1",
            "3.2.3",
            "3.2.3-beta-3",
            "3.2.3-beta-2",
            "3.2.3-beta-1",
            "3.2.2",
            "3.2.2-beta-3",
            "3.2.2-beta-2",
            "3.2.2-beta-1",
            "3.2.1",
            "3.2.0",
            "3.2.0-beta-2",
            "3.2.0-beta-1",
            "3.1.2-beta-1",
            "3.1.1",
            "3.1.1-beta-2",
            "3.1.1-beta-1",
            "3.1.0",
            "3.1.0-beta-3",
            "3.1.0-beta-2",
            "3.1.0-beta-1",
            "3.0.4-beta-5",
            "3.0.4-beta-4",
            "3.0.4-beta-3",
            "3.0.4-beta-2",
            "3.0.4-beta-1",
            "3.0.3",
            "3.0.2",
            "3.0.2-beta-1",
            "3.0.1",
            "3.0.0",
            "3.0.0-beta-2",
            "3.0.0-beta-1",
            "3.0.0-alpha-4",
            "3.0.0-alpha-2",
            "3.0.0-alpha-1",
            "2.3.7",
            "2.3.6"
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2021-42362.json"
          }
        }
      ],
      "modified": "2026-10-20T10:54:04.045350507Z",
      "provider": "osv",
      "references": [
        "https://wpscan.com/vulnerability/bd4f157c-a3d7-4535-a587-0102ba4e3009",
        "https://www.wordfence.com/vulnerability-advisories/#CVE-2021-42362",
        "https://github.com/cabrerahector/wordpress-popular-posts/commit/d9b274cf6812eb446e4103cb18f69897ec6fe601",
        "https://plugins.trac.wordpress.org/changeset/2542638/wordpress-popular-posts/trunk/src/Image.php",
        "https://blog.nintechnet.com/improper-input-validation-fixed-in-wordpress-popular-posts-plugin/"
      ],
      "provider_metadata": {}
    },
    "related_cves": [
      {
        "value": "CVE-2021-42362",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 384836,
  "published_at": "2021-11-17T18:15:08.297+00:00"
}