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Masa CMS vulnerable to Cross-Site Scripting (XSS) through URL Parameter

Type: advisorySources: OSV

Masa CMS is an open source Enterprise Content Management platform. Versions 7.2.8 and below, 7.3.1 through 7.3.13, 7.4.0-alpha.1 through 7.4.8 and 7.5.0 through 7.5.1 are vulnerable to XSS when an unsanitized value of the ajax URL query parameter is directly included within the section of the HTML page. An attacker can execute arbitrary scripts in the context of the user's session, potentially leading to Session Hijacking, Data Theft, Defacement and Malware Distribution. This issue is fixed in versions 7.5.2, 7.4.9, 7.3.14, and 7.2.9. To work around this issue, configure a Web Application Firewall (WAF) rule (e.g., ModSecurity) to block requests containing common XSS payload characters in the ajax query parameter. Alternatively, implement server-side sanitization using middleware to strip or escape dangerous characters from the ajax parameter before it reaches the vulnerable rendering logic.

Products
Not specified
Affected versions
Not specified
Fixed versions
Not specified
CVEs
CVE-2025-66492
Confirmed fixed CVEs
Not specified
Updated in this feed
3 Nov 2026, 18:27 UTC · Revision 1

Source evidence

Masa CMS vulnerable to Cross-Site Scripting (XSS) through URL Parameter

core-osv · Original source

Published 12 Dec 2025, 04:50 UTC

Masa CMS is an open source Enterprise Content Management platform. Versions 7.2.8 and below, 7.3.1 through 7.3.13, 7.4.0-alpha.1 through 7.4.8 and 7.5.0 through 7.5.1 are vulnerable to XSS when an unsanitized value of the ajax URL query parameter is directly included within the section of the HTML page. An attacker can execute arbitrary scripts in the context of the user's session, potentially leading to Session Hijacking, Data Theft, Defacement and Malware Distribution. This issue is fixed in versions 7.5.2, 7.4.9, 7.3.14, and 7.2.9. To work around this issue, configure a Web Application Firewall (WAF) rule (e.g., ModSecurity) to block requests containing common XSS payload characters in the ajax query parameter. Alternatively, implement server-side sanitization using middleware to strip or escape dangerous characters from the ajax parameter before it reaches the vulnerable rendering logic.

osv:CVE-2025-66492
Complete source record
{
  "id": "4b71f3790533e525137cf53a9e9f972beb41222af690425572e11fd2282857f2",
  "url": "https://osv.dev/vulnerability/CVE-2025-66492",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "Masa CMS vulnerable to Cross-Site Scripting (XSS) through URL Parameter",
    "summary": "Masa CMS is an open source Enterprise Content Management platform. Versions 7.2.8 and below, 7.3.1 through 7.3.13, 7.4.0-alpha.1 through 7.4.8 and 7.5.0 through 7.5.1 are vulnerable to XSS when an unsanitized value of the ajax URL query parameter is directly included within the section of the HTML page. An attacker can execute arbitrary scripts in the context of the user's session, potentially leading to Session Hijacking, Data Theft, Defacement and Malware Distribution. This issue is fixed in versions 7.5.2, 7.4.9, 7.3.14, and 7.2.9. To work around this issue, configure a Web Application Firewall (WAF) rule (e.g., ModSecurity) to block requests containing common XSS payload characters in the ajax query parameter. Alternatively, implement server-side sanitization using middleware to strip or escape dangerous characters from the ajax parameter before it reaches the vulnerable rendering logic.",
    "evidence": "osv:CVE-2025-66492",
    "products": [],
    "severity": "high",
    "structured": {
      "id": "CVE-2025-66492",
      "aliases": [
        "CVE-2025-66492",
        "GHSA-249c-vqwv-43vc"
      ],
      "metrics": [
        {
          "type": "CVSS_V3",
          "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:L/A:N"
        }
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://github.com/masacms/masacms",
              "type": "GIT",
              "events": [
                {
                  "introduced": "0"
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                {
                  "fixed": "860e7ce75059195f25bc0ccc6e44a464e05a56fb"
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              "database_specific": {
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                    "cpe": "cpe:2.3:a:masacms:masacms:*:*:*:*:*:*:*:*",
                    "range": [
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                        "introduced": "7.3.1"
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                  {
                    "cpe": "cpe:2.3:a:masacms:masacms:*:*:*:*:*:*:*:*",
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                    "cpe": "cpe:2.3:a:masacms:masacms:*:*:*:*:*:*:*:*",
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                        "fixed": "7.5.2"
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                  {
                    "range": [
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                        "fixed": "376c27196b1e2489888b7a000cdf5c45bb85959e"
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                    ],
                    "source": "REFERENCES_COMMIT"
                  }
                ]
              }
            }
          ],
          "versions": [
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            "7.3.13",
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            "7.5.1",
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            "7.4.7",
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            "7.4.2",
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            "7.2.5",
            "7.3.10",
            "7.4.0",
            "7.2.4",
            "7.3.9",
            "7.3.8",
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            "7.0.6967",
            "7.0.6930",
            "7.0.6919",
            "6.2.6527",
            "6.2.6161",
            "5.5"
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2025-66492.json"
          }
        }
      ],
      "modified": "2026-10-28T02:30:31.689737056Z",
      "provider": "osv",
      "references": [
        "https://github.com/CVEProject/cvelistV5/tree/main/cves/2025/66xxx/CVE-2025-66492.json",
        "https://github.com/MasaCMS/MasaCMS/security/advisories/GHSA-249c-vqwv-43vc",
        "https://nvd.nist.gov/vuln/detail/CVE-2025-66492",
        "https://github.com/MasaCMS/MasaCMS/commit/376c27196b1e2489888b7a000cdf5c45bb85959e"
      ],
      "provider_metadata": {
        "cwe_ids": [
          "CWE-79"
        ],
        "cna_assigner": "GitHub_M",
        "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2025/66xxx/CVE-2025-66492.json"
      }
    },
    "related_cves": [
      {
        "value": "CVE-2025-66492",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 498430,
  "published_at": "2025-12-12T04:50:00.637+00:00"
}