Unauthorized AJAX actions via missing nonce validation
Published Dec 9, 2023 · Updated Apr 8, 2026
CSRF in WordPress FlipBook by Supsystic 1.7.6 and earlier allows remote attackers to execute AJAX actions through a forged request. The AJAX dispatcher in classes/frame.php accepts an action request without correctly validating a WordPress nonce before invoking the requested handler. Exploitation requires an administrator with an active session to open an attacker-controlled link; the public record does not identify which AJAX actions are reachable.
Summary
What happened
CSRF in WordPress FlipBook by Supsystic 1.7.6 and earlier allows remote attackers to execute AJAX actions through a forged request. The AJAX dispatcher in classes/frame.php accepts an action request without correctly validating a WordPress nonce before invoking the requested handler. Exploitation requires an administrator with an active session to open an attacker-controlled link; the public record does not identify which AJAX actions are reachable.
The record
- CVE
- CVE-2023-5756
- Published
- Dec 9, 2023
- Updated
- Apr 8, 2026
- Vendor
- Supsystic
- Product
- WordPress FlipBook by Supsystic
- Classifications
- CWE-352, T1204.001
- Attack vector
- network
- Privileges
- unauthenticated
Timeline
How it unfolded
- Dec 9, 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
Compare your product and version with the public record. A matching version still requires validation against your environment.
Is a vulnerable build present?
Compare these published version ranges with your installed build and any vendor patches.
- Affected versionversion=0 <=1.7.6
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
No public exploit references are available in this record.
Labels summarize the accepted research assessment. They do not indicate a test against your environment.
Technologies
Your stack
See the directory against your own environment.
Your stack
Check the software in your environment
Book a demo to see how Hinoki identifies affected software and validates exploitability in your environment.
Book a demo