SMTP configuration changes via missing nonce validation
Published Jan 21, 2026 · Updated Jan 21, 2026
CSRF in the GetSimple CMS SMTP Contact Plugin 1.1.1 allows remote attackers to alter SMTP settings through an administrator's browser. The plugin's addsettings action accepts configuration POST data without validating the CMS nonce. Exploitation requires an authenticated administrator to visit an attacker-controlled page; direct impact is unauthorized configuration modification, while code execution requires a separate PHP injection flaw.
Summary
What happened
CSRF in the GetSimple CMS SMTP Contact Plugin 1.1.1 allows remote attackers to alter SMTP settings through an administrator's browser. The plugin's addsettings action accepts configuration POST data without validating the CMS nonce. Exploitation requires an authenticated administrator to visit an attacker-controlled page; direct impact is unauthorized configuration modification, while code execution requires a separate PHP injection flaw.
The record
- CVE
- CVE-2021-47830
- Published
- Jan 21, 2026
- Updated
- Jan 21, 2026
- Vendor
- GetSimple CMS
- Product
- My SMTP Contact Plugin
- Classifications
- CWE-352, CAPEC-62
- Attack vector
- network
- Privileges
- unauthenticated
Timeline
How it unfolded
- Jan 21, 2026CVE publishedPublication date reported by the CVE source.
- Jan 21, 2026Record 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=1.1.1
What conditions does exploitation require?
What is affected?
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.
Weakness, pattern, technique
Public exploit references
- GetSimple CMS My SMTP Contact Plugin CSRF-XSS-RCE chainfunctional · demonstrated
- GetSimple CMS My SMTP Contact Plugin 1.1.1 CSRF to RCEfunctional · demonstrated
Labels summarize the accepted research assessment. They do not indicate a test against your environment.
Technologies
Your stack
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Your stack
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