Cross-site request forgery in Schneider Electric Embedded Web Servers in all Modicon…
Priority LOW 39CWE-352Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- Required
- Attack complexity
- Low
- Impact type
- Tampering, Cross-site scripting
- Confidentiality · integrity · availability
- High · High · High
- Fix status
- No fix listed
Attack profile from CVSS 3.0 · NVD. Fix status from CNA. Impact type from CWE-352 and CWE-79.
Summary
An Improper Neutralization of Script-Related HTML Tags in a Web Page (Basic XSS) vulnerability exists in the embedded web servers in all Modicon M340, Premium, Quantum PLCs and BMXNOR0200 allowing an attacker to send a specially crafted URL to a currently authenticated web server user to execute a password change on the web server.
Why it matters now
EPSS 0.00635 50th 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 |
|---|---|---|---|---|---|
| Schneider Electric | Embedded Web Servers in all Modicon M340, Premium, Quantum PLCs and BMXNOR0200 | Embedded Web Servers in all Modicon M340, Premium, Quantum PLCs and BMXNOR0200 | — | No fix listed | CNA |
- Embedded Web Servers in all Modicon M340, Premium, Quantum PLCs and BMXNOR0200 VendorSchneider Electric Affected Embedded Web Servers in all Modicon M340, Premium, Quantum PLCs and BMXNOR0200 Fixed in — No fix listed CNA
CPE configurations NVD · 8
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:o:schneider-electric:modicom_m340_firmware:*:*:*:*:*:*:*:* | all versions | Vulnerable | Schneider Electric |
| cpe:2.3:h:schneider-electric:modicom_m340:-:*:*:*:*:*:*:* | not specified by NVD | Running on | Schneider Electric |
| cpe:2.3:o:schneider-electric:modicom_premium_firmware:*:*:*:*:*:*:*:* | all versions | Vulnerable | Schneider Electric |
| cpe:2.3:h:schneider-electric:modicom_premium:-:*:*:*:*:*:*:* | not specified by NVD | Running on | Schneider Electric |
| cpe:2.3:o:schneider-electric:modicom_quantum_firmware:*:*:*:*:*:*:*:* | all versions | Vulnerable | Schneider Electric |
| cpe:2.3:h:schneider-electric:modicom_quantum:-:*:*:*:*:*:*:* | not specified by NVD | Running on | Schneider Electric |
| cpe:2.3:o:schneider-electric:modicom_bmxnor0200h_firmware:*:*:*:*:*:*:*:* | all versions | Vulnerable | Schneider Electric |
| cpe:2.3:h:schneider-electric:modicom_bmxnor0200h:-:*:*:*:*:*:*:* | not specified by NVD | Running on | Schneider Electric |
- cpe:2.3:o:schneider-electric:modicom_m340_firmware:*:*:*:*:*:*:*:* Versions all versions Vulnerable ·Schneider Electric
- cpe:2.3:h:schneider-electric:modicom_m340:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Schneider Electric
- cpe:2.3:o:schneider-electric:modicom_premium_firmware:*:*:*:*:*:*:*:* Versions all versions Vulnerable ·Schneider Electric
- cpe:2.3:h:schneider-electric:modicom_premium:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Schneider Electric
- cpe:2.3:o:schneider-electric:modicom_quantum_firmware:*:*:*:*:*:*:*:* Versions all versions Vulnerable ·Schneider Electric
- cpe:2.3:h:schneider-electric:modicom_quantum:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Schneider Electric
- cpe:2.3:o:schneider-electric:modicom_bmxnor0200h_firmware:*:*:*:*:*:*:*:* Versions all versions Vulnerable ·Schneider Electric
- cpe:2.3:h:schneider-electric:modicom_bmxnor0200h:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Schneider Electric
Remediation
No fixed version listed by the sources yet.
Timeline
- 2026-10-02 Threatist record created from CVE-2018-7831
- 2026-10-03 Alias added: GHSA-p8fg-26j2-2q9g
- 2026-10-25 EPSS moved to the 50th–90th percentile
References
More Schneider Electric Modicom Bmxnor0200h Firmware vulnerabilities
- TI-2018-05651 Weak password recovery in Schneider Electric Embedded Web Servers in all Modicon M340… CVSS 3.0CRITICAL 9.8
- TI-2018-05649 Weak password recovery in Schneider Electric Embedded Web Servers in all Modicon M340… CVSS 3.0CRITICAL 9.8
- TI-2018-05652 Information disclosure in Schneider Electric Embedded Web Servers in all Modicon M340… CVSS 3.0HIGH 7.5
- TI-2018-05668 HTTP response splitting in Schneider Electric Embedded Web Servers in all Modicon M340… CVSS 3.0HIGH 7.5
- TI-2018-05671 Improper check for unusual conditions in Schneider Electric Embedded Web Servers in all… CVSS 3.0HIGH 7.5
- TI-2018-05650 Cross-site scripting in Schneider Electric Embedded Web Servers in all Modicon M340… CVSS 3.0MEDIUM 6.1
Sources
- CVE-2018-7831 · CVE Program
- CVE-2018-7831 · NVD
- FIRST EPSS
- GHSA-p8fg-26j2-2q9g · 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