ExpressionEngine before 4.3.5 has reflected XSS.
Priority LOW 28CWE-79Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- None
- 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
ExpressionEngine before 4.3.5 has reflected XSS.
Why it matters now
EPSS 0.00647 51st 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
| 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 · 1
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:a:expressionengine:expressionengine:*:*:*:*:*:*:*:* | before 4.3.5 | Vulnerable | ExpressionEngine |
- cpe:2.3:a:expressionengine:expressionengine:*:*:*:*:*:*:*:* Versions before 4.3.5 Vulnerable ·ExpressionEngine
Remediation
No fixed version listed by the sources yet.
Timeline
- 2026-10-02 Threatist record created from CVE-2018-17874
- 2026-10-03 Alias added: GHSA-hjjp-hc99-6gw9
- 2026-10-19 EPSS moved to the 50th–90th percentile
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-2018-17874 · CVE Program
- CVE-2018-17874 · NVD
- FIRST EPSS
- GHSA-hjjp-hc99-6gw9 · 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