Remote code execution via missing nonce validation
Published Oct 18, 2025 · Updated Oct 18, 2025
CSRF in mndpsingh287 Theme Editor 3.0 and earlier allows remote attackers to execute code through a forged administrator request. The theme_editor_theme page accepts a state-changing editor request without correctly validating its WordPress nonce before writing executable theme or plugin content. Exploitation requires an administrator with an active session to open an attacker-controlled link, after which code runs in the WordPress server context.
Summary
What happened
CSRF in mndpsingh287 Theme Editor 3.0 and earlier allows remote attackers to execute code through a forged administrator request. The theme_editor_theme page accepts a state-changing editor request without correctly validating its WordPress nonce before writing executable theme or plugin content. Exploitation requires an administrator with an active session to open an attacker-controlled link, after which code runs in the WordPress server context.
The record
- CVE
- CVE-2025-9890
- Published
- Oct 18, 2025
- Updated
- Oct 18, 2025
- Vendor
- mndpsingh287
- Product
- Theme Editor
- Classifications
- CWE-352, T1204.001
- Attack vector
- network
- Privileges
- unauthenticated
Timeline
How it unfolded
- Oct 18, 2025CVE publishedPublication date reported by the CVE source.
- Oct 18, 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=* <=3.0
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.
Weakness, pattern, technique
Public exploit references
No public exploit references are available in this record.
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Technologies
Your stack
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Your stack
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