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EllisLab ExpressionEngine 3.4.2 is vulnerable to cross-site scripting resulting in PHP code injection

Priority LOW 25CWE-79Published · Updated

Key facts

Attack vector
Network
Privileges required
Low
User interaction
Required
Attack complexity
Low
Impact type
Cross-site scripting
Confidentiality · integrity · availability
Low · Low · None
Fix status
No fix listed

Attack profile from CVSS 3.0 · NVD. Fix status from CNA. Impact type from CWE-79.

Summary

EllisLab ExpressionEngine 3.4.2 is vulnerable to cross-site scripting resulting in PHP code injection

Why it matters now

EPSS 0.00511 43rd percentileScored 2026-11-07
Fix No fix listed No fixed version in the sources yet

SSVC decision points

Not available: CISA has not published SSVC decision points for this record.

Affected products

VendorProductAffected versionsFixed inStatusSource
——all versions—No fix listedCNA
  • — Vendor— Affected all versions Fixed in — No fix listed CNA

CPE configurations NVD · 1

CPEVersionsRoleVendor
cpe:2.3:a:expressionengine:expressionengine:3.4.2:*:*:*:*:*:*:*3.4.2VulnerableExpressionEngine
  • cpe:2.3:a:expressionengine:expressionengine:3.4.2:*:*:*:*:*:*:* Versions 3.4.2 Vulnerable ·ExpressionEngine

Remediation

No fixed version listed by the sources yet.

Timeline

  1. 2026-10-02 Threatist record created from CVE-2017-1000160
  2. 2026-10-03 Alias added: GHSA-v385-82h8-gh8f

References

  • TI-2021-12747 In Expression Engine before 6.0.3, addonIcon in Addons/file/mod.file.php relies on the… CVSS 3.1CRITICAL 9.8
  • TI-2020-10544 ExpressionEngine before 5.3.2 allows remote attackers to upload and execute arbitrary… CVSS 3.1HIGH 8.8
  • TI-2021-08771 ExpressionEngine before 5.4.2 and 6.x before 6.0.3 allows PHP Code Injection by certain… CVSS 3.1HIGH 8.8
  • TI-2023-09084 In ExpressionEngine before 7.2.6, remote code execution can be achieved by an authenticated Control Panel user. CVSS 3.1HIGH 8.8
  • TI-2017-00845 ExpressionEngine version 2.x < 2.11.8 and version 3.x < 3.5.5 create an object signing… CVSS 3.0HIGH 7.5
  • TI-2020-06660 SQL injection in ExpressionEngine CVSS 3.1HIGH 7.2
See all 13 →

Sources