Administrator-level object injection via unsafe deserialization
Published Dec 18, 2023 · Updated Apr 28, 2026
PHP object injection in E2Pdf – Export Pdf Tool for WordPress 1.20.18 and earlier allows remote authenticated users to inject PHP objects. The import_action and ajax_upload functions deserialize attacker-controlled input without preventing PHP object instantiation. Administrator access and a usable POP chain are required; the chain can execute code, read sensitive data, or delete files.
Summary
What happened
PHP object injection in E2Pdf – Export Pdf Tool for WordPress 1.20.18 and earlier allows remote authenticated users to inject PHP objects. The import_action and ajax_upload functions deserialize attacker-controlled input without preventing PHP object instantiation. Administrator access and a usable POP chain are required; the chain can execute code, read sensitive data, or delete files.
The record
- CVE
- CVE-2023-46154
- Published
- Dec 18, 2023
- Updated
- Apr 28, 2026
- Vendor
- E2Pdf
- Product
- E2Pdf – Export Pdf Tool for WordPress
- Classifications
- CWE-502, T1190
- Attack vector
- network
- Privileges
- admin
Timeline
How it unfolded
- Dec 18, 2023CVE publishedPublication date reported by the CVE source.
- Apr 28, 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=n/a <=1.20.18 changes=[{"at":"1.20.19","status":"unaffected"}]
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.
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