Vulnerability-Lookup

GHSA-PFQ7-53PJ-Q6WC

Vulnerability from github – Published: 2026-01-19 15:30 – Updated: 2026-01-22 00:31

Details

A stored cross-site scripting (XSS) vulnerability exists in the Altium Forum due to missing server-side input sanitization in forum post content. An authenticated attacker can inject arbitrary JavaScript into forum posts, which is stored and executed when other users view the affected post. Successful exploitation allows the attacker’s payload to execute in the context of the victim’s authenticated Altium 365 session, enabling unauthorized access to workspace data, including design files and workspace settings. Exploitation requires user interaction to view a malicious forum post.

Severity ?

9.0 (Critical)


                  
                    CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:H/A:H

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{
  "affected": [],
  "aliases": [
    "CVE-2026-1181"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-284",
      "CWE-79"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-01-19T13:16:20Z",
    "severity": "CRITICAL"
  },
  "details": "A stored cross-site scripting (XSS) vulnerability exists in the Altium Forum due to missing server-side input sanitization in forum post content. An authenticated attacker can inject arbitrary JavaScript into forum posts, which is stored and executed when other users view the affected post.\nSuccessful exploitation allows the attacker\u2019s payload to execute in the context of the victim\u2019s authenticated Altium 365 session, enabling unauthorized access to workspace data, including design files and workspace settings. Exploitation requires user interaction to view a malicious forum post.",
  "id": "GHSA-pfq7-53pj-q6wc",
  "modified": "2026-01-22T00:31:30Z",
  "published": "2026-01-19T15:30:37Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-1181"
    },
    {
      "type": "WEB",
      "url": "https://www.altium.com/platform/security-compliance/security-advisories"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:H/A:H",
      "type": "CVSS_V3"
    }
  ]
}

CVE-2026-1181 (GCVE-0-2026-1181)

Vulnerability from cvelistv5 – Published: 2026-01-19 12:00 – Updated: 2026-01-22 01:42

Title

Altium 365 Over-Permissive CORS Configuration Allows Credentialed Cross-Origin Workspace Access

Summary

Altium 365 workspace endpoints were configured with an overly permissive Cross-Origin Resource Sharing (CORS) policy that allowed credentialed cross-origin requests from other Altium-controlled subdomains, including forum.live.altium.com. As a result, JavaScript executing on those origins could access authenticated workspace APIs in the context of a logged-in user. When chained with vulnerabilities in those external applications, this misconfiguration enables unauthorized access to workspace data, administrative actions, and bypass of IP allowlisting controls, including in GovCloud environments.

Severity ?

9 (Critical)


                        
                          CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:H/A:H

CWE

CWE-942 - – Permissive Cross-domain Policy with Untrusted Domains
CWE-284 - Improper Access Control

Assigner

Altium

References

URL

Tags

https://www.altium.com/platform/security-complian…

Impacted products

	Vendor	Product	Version
	Altium	Altium 365	Affected: unspecified (semver)

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JSON

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  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "other": {
              "content": {
                "id": "CVE-2026-1181",
                "options": [
                  {
                    "Exploitation": "none"
                  },
                  {
                    "Automatable": "no"
                  },
                  {
                    "Technical Impact": "total"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2026-01-20T21:29:36.260341Z",
                "version": "2.0.3"
              },
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          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      }
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          "modules": [
            "Workspace API"
          ],
          "platforms": [
            "Web"
          ],
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          "vendor": "Altium",
          "versions": [
            {
              "status": "affected",
              "version": "unspecified",
              "versionType": "semver"
            }
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      ],
      "datePublic": "2026-01-15T22:48:00.000Z",
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              "base64": false,
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            }
          ],
          "value": "Altium 365 workspace endpoints were configured with an overly permissive Cross-Origin Resource Sharing (CORS) policy that allowed credentialed cross-origin requests from other Altium-controlled subdomains, including forum.live.altium.com. As a result, JavaScript executing on those origins could access authenticated workspace APIs in the context of a logged-in user. When chained with vulnerabilities in those external applications, this misconfiguration enables unauthorized access to workspace data, administrative actions, and bypass of IP allowlisting controls, including in GovCloud environments."
        }
      ],
      "impacts": [
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          "capecId": "CAPEC-122",
          "descriptions": [
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              "lang": "en",
              "value": "CAPEC-122 Privilege Abuse"
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          "capecId": "CAPEC-17",
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              "lang": "en",
              "value": "CAPEC-17 Accessing, Modifying, or Executing Executable Files"
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          "capecId": "CAPEC-233",
          "descriptions": [
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              "value": "CAPEC-233 Privilege Escalation via Trust Boundary Violation"
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            "attackVector": "NETWORK",
            "availabilityImpact": "HIGH",
            "baseScore": 9,
            "baseSeverity": "CRITICAL",
            "confidentialityImpact": "HIGH",
            "integrityImpact": "HIGH",
            "privilegesRequired": "LOW",
            "scope": "CHANGED",
            "userInteraction": "REQUIRED",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:H/A:H",
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              "type": "CWE"
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          ]
        },
        {
          "descriptions": [
            {
              "cweId": "CWE-284",
              "description": "CWE-284 Improper Access Control",
              "lang": "en",
              "type": "CWE"
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        "orgId": "4760f414-e1ae-4ff1-bdad-c7a9c3538b79",
        "shortName": "Altium"
      },
      "references": [
        {
          "url": "https://www.altium.com/platform/security-compliance/security-advisories"
        }
      ],
      "source": {
        "discovery": "UNKNOWN"
      },
      "title": "Altium 365 Over-Permissive CORS Configuration Allows Credentialed Cross-Origin Workspace Access",
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    "datePublished": "2026-01-19T12:00:10.265Z",
    "dateReserved": "2026-01-19T11:47:00.514Z",
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Sightings

Author	Source	Type	Date

Nomenclature

Seen: The vulnerability was mentioned, discussed, or observed by the user.
Confirmed: The vulnerability has been validated from an analyst's perspective.
Published Proof of Concept: A public proof of concept is available for this vulnerability.
Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
Not confirmed: The user expressed doubt about the validity of the vulnerability.
Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.

Detection rules are retrieved from Rulezet.

Action not permitted

GHSA-PFQ7-53PJ-Q6WC

CVE-2026-1181 (GCVE-0-2026-1181)

Tags

Sightings

Nomenclature