Unauthenticated code execution via unescaped object_id backticks
Published May 22, 2019 · Updated Oct 21, 2025
Command injection in Schneider Electric U.motion Builder 1.3.4 allows remote attackers to execute code via crafted HTTP requests. The track_import_export.php export handler passes object_id through SQLite query construction into PHP exec, escaping dollar signs but leaving backtick command substitution executable. Exploitation requires network access to the HTTP endpoint, not authentication, and executes commands in the application's Linux appliance context.
Summary
What happened
Command injection in Schneider Electric U.motion Builder 1.3.4 allows remote attackers to execute code via crafted HTTP requests. The track_import_export.php export handler passes object_id through SQLite query construction into PHP exec, escaping dollar signs but leaving backtick command substitution executable. Exploitation requires network access to the HTTP endpoint, not authentication, and executes commands in the application's Linux appliance context.
The record
- CVE
- CVE-2018-7841
- Published
- May 22, 2019
- Updated
- Oct 21, 2025
- Vendor
- Schneider Electric SE
- Product
- U.motion Builder
- Classifications
- CWE-89, CWE-78, T1190, T1059.004
- Attack vector
- network
- Privileges
- unauthenticated
Timeline
How it unfolded
- May 22, 2019CVE publishedPublication date reported by the CVE source.
- Oct 21, 2025Record updatedLatest update available in the CVE record.
Exploitability
Present is not the same as exploitable
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Is a vulnerable build present?
Compare these published version ranges with your installed build and any vendor patches.
- Affected versionversion=U.motion Builder software version 1.3.4
What conditions does exploitation require?
What is affected?
Published CVSS scores
CVSS describes severity. EPSS estimates exploitation probability.
Attacks
What attackers are doing with it
Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.
Activity data is delayed. The latest report is Sep 28, 2026.
View daily counts
| Reporting day | Unique IPs |
|---|---|
| Sep 22, 2026 | 11 |
| Sep 23, 2026 | 3 |
| Sep 24, 2026 | 6 |
| Sep 25, 2026 | 17 |
| Sep 26, 2026 | 5 |
| Sep 27, 2026 | 13 |
| Sep 28, 2026 | 13 |
Weakness, pattern, technique
Public exploit references
- object_id command-substitution proof of conceptproof of concept · demonstrated
- U.motion Builder reverse-shell demonstrationproof of concept · demonstrated
Labels summarize the accepted research assessment. They do not indicate a test against your environment.
Reported exploitation
- CISA KEV inclusion for CVE-2018-7841known exploited catalog
Technologies
Your stack
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Your stack
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