Security advisory

{
  "id": "7cdcde3f0b38eca08bb3bea951cff57e0dd5463ffa63a2dc98bed2560f89e3c5",
  "url": "https://osv.dev/vulnerability/CVE-2021-36872",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "CVE-2021-36872",
    "summary": "Authenticated Persistent Cross-Site Scripting (XSS) vulnerability in WordPress Popular Posts plugin (versions <= 5.3.3). Vulnerable at &widget-wpp[2][post_type].",
    "evidence": "osv:CVE-2021-36872",
    "products": [],
    "severity": "medium",
    "structured": {
      "id": "CVE-2021-36872",
      "aliases": [
        "CVE-2021-36872"
      ],
      "metrics": [
        {
          "type": "CVSS_V3",
          "score": "CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N"
        }
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://github.com/cabrerahector/wordpress-popular-posts",
              "type": "GIT",
              "events": [
                {
                  "introduced": "0"
                },
                {
                  "last_affected": "340fb5995bcefd57f5db8d3f31fac2dc67e9310c"
                }
              ],
              "database_specific": {
                "extracted_events": [
                  {
                    "cpe": "cpe:2.3:a:wordpress_popular_posts_project:wordpress_popular_posts:*:*:*:*:*:wordpress:*:*",
                    "range": [
                      {
                        "introduced": "0"
                      },
                      {
                        "last_affected": "5.3.3"
                      }
                    ],
                    "source": "CPE_RANGE"
                  }
                ]
              }
            }
          ],
          "versions": [
            "5.3.3",
            "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-2021-36872.json"
          }
        }
      ],
      "modified": "2026-10-20T10:54:48.733382021Z",
      "provider": "osv",
      "references": [
        "https://github.com/cabrerahector/wordpress-popular-posts/blob/master/changelog.md",
        "https://patchstack.com/database/vulnerability/wordpress-popular-posts/wordpress-popular-posts-plugin-5-3-3-authenticated-persistent-cross-site-scripting-xss-vulnerability"
      ],
      "provider_metadata": {}
    },
    "related_cves": [
      {
        "value": "CVE-2021-36872",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 386180,
  "published_at": "2021-09-23T15:15:07.84+00:00"
}