Cross-site scripting (XSS) vulnerability in system/index.php in ExpressionEngine 1.6.4…
Priority LOW 23CWE-79Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- — Not recorded in CVSS 2.0
- Attack complexity
- Medium
- Impact type
- Cross-site scripting
- Confidentiality · integrity · availability
- None · Partial · None
- Fix status
- No fix listed
Attack profile from CVSS 2.0 · NVD. Fix status from CNA. Impact type from CWE-79.
Summary
Cross-site scripting (XSS) vulnerability in system/index.php in ExpressionEngine 1.6.4 through 1.6.6, and possibly earlier versions, allows remote attackers to inject arbitrary web script or HTML via the avatar parameter.
Why it matters now
EPSS 0.01718 77th percentileScored 2026-11-07
Public exploit Yes 1 exploit referenceTagged by NVD
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
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| — | — | all versions | — | No fix listed | CNA |
- — Vendor— Affected all versions Fixed in — No fix listed CNA
CPE configurations NVD · 3
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:a:expressionengine:expressionengine:1.6.4:*:*:*:*:*:*:* | 1.6.4 | Vulnerable | ExpressionEngine |
| cpe:2.3:a:expressionengine:expressionengine:1.6.5:*:*:*:*:*:*:* | 1.6.5 | Vulnerable | ExpressionEngine |
| cpe:2.3:a:expressionengine:expressionengine:1.6.6:*:*:*:*:*:*:* | 1.6.6 | Vulnerable | ExpressionEngine |
- cpe:2.3:a:expressionengine:expressionengine:1.6.4:*:*:*:*:*:*:* Versions 1.6.4 Vulnerable ·ExpressionEngine
- cpe:2.3:a:expressionengine:expressionengine:1.6.5:*:*:*:*:*:*:* Versions 1.6.5 Vulnerable ·ExpressionEngine
- cpe:2.3:a:expressionengine:expressionengine:1.6.6:*:*:*:*:*:*:* Versions 1.6.6 Vulnerable ·ExpressionEngine
Remediation
No fixed version listed by the sources yet.
Timeline
- 2026-10-02 Threatist record created from CVE-2009-1070
- 2026-10-03 Alias added: GHSA-mcq6-hwmc-gp67
References
More Expressionengine vulnerabilities
- 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
Sources
- CVE-2009-1070 · CVE Program
- CVE-2009-1070 · NVD
- FIRST EPSS
- GHSA-mcq6-hwmc-gp67 · GitHub Advisory Database · CC BY 4.0
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences