Post metadata modification via missing nonce validation
Published Jul 12, 2023 · Updated Apr 8, 2026
Cross-site request forgery in ghuger Custom Banners 3.2.2 and earlier allows remote attackers to alter post metadata via forged requests. The saveCustomFields() method accepts requests without the required nonce value and still saves custom fields for the targeted post. Exploitation requires a logged-in user with edit_post capability to submit the attacker-controlled request, so the confirmed consequence is unauthorized modification of post metadata.
Summary
What happened
Cross-site request forgery in ghuger Custom Banners 3.2.2 and earlier allows remote attackers to alter post metadata via forged requests. The saveCustomFields() method accepts requests without the required nonce value and still saves custom fields for the targeted post. Exploitation requires a logged-in user with edit_post capability to submit the attacker-controlled request, so the confirmed consequence is unauthorized modification of post metadata.
The record
- CVE
- CVE-2021-4407
- Published
- Jul 12, 2023
- Updated
- Apr 8, 2026
- Vendor
- ghuger
- Product
- Custom Banners
- Classifications
- CWE-352, T1204.001
- Attack vector
- network
- Privileges
- unauthenticated
Timeline
How it unfolded
- Jul 12, 2023CVE publishedPublication date reported by the CVE source.
- Apr 8, 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=0 <=3.2.2
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.
Public exploit references
- WPScan missing-nonce proof of conceptproof of concept · validated
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Technologies
Your stack
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Your stack
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