Simple Job Board <= 2.11.0 - Unauthenticated PHP Object Injection via Job Application Fields
Strategic Overview
- Status
- Patched in 2.11.1
- Affected Plugin
- Simple Job Board
- Affected Version
<= 2.11.0- CVSS
- 9.8Critical
- Weakness type
- CWE-502 · Deserialization of Untrusted Data
- CVE
CVE-2024-1813
At a glance
CVE-2024-1813 is a critical-severity Deserialization of Untrusted Data vulnerability in the Simple Job Board WordPress plugin, affecting versions <= 2.11.0. It carries a CVSS score of 9.8 (reachable over the network; low attack complexity; high confidentiality, integrity, availability impact). Exploitation requires no authentication. The issue is fixed in version 2.11.1; sites on affected versions should update now. Disclosed March 2024, reported by Francesco Carlucci.
Vulnerability Overview
The Simple Job Board plugin for WordPress is vulnerable to PHP Object Injection in all versions up to, and including, 2.11.0 via deserialization of untrusted input in the job_board_applicant_list_columns_value function. This makes it possible for unauthenticated attackers to inject a PHP Object. If a POP chain is present via an additional plugin or theme installed on the target system, it could allow the attacker to delete arbitrary files, retrieve sensitive data, or execute code when a submitted job application is viewed.
Technical Analysis
The vector marks this flaw as remotely reachable over the network, with low attack complexity — no special timing or configuration is needed, and no privileges on the target site, and no interaction from a victim user. A successful exploit has high impact on confidentiality, integrity, availability — full site compromise territory.
CWE-502: Deserialization of Untrusted Data
Reaching this weakness in Simple Job Board <= 2.11.0 takes no account at all. Deserialization of untrusted data means the application reconstructs objects from input a caller controls, letting the attacker choose which classes get instantiated and what their properties hold.
A workable chain turns deserialization into file writes, deletions or code execution, depending on what the loaded classes do in their magic methods. For Simple Job Board the fix is 2.11.1: builds <= 2.11.0 are affected, anything from 2.11.1 onward is not.
Remediation
Update to version 2.11.1, or a newer patched version
How does WordSec protect against this?
Requests carrying this pattern arrive without a session, so nothing upstream of the firewall gets a chance to reject them: WordSec's web application firewall inspects request payloads before WordPress loads them. Classes like this one can leave something behind, so the staged malware scanner is the second half: it looks for dropped files and modified code rather than for the request that created them. None of that substitutes for the fix: Simple Job Board 2.11.1 closes this, and updating the plugin is the step that ends it.
- Firewall
- Scanner
- Login Security
External References
Related records
Other vulnerabilities in Simple Job Board
- 7.7CVE-2020-35749: Simple Job Board <= 2.9.3 Local File Inclusion
CVE-2020-35749 - 7.5CVE-2022-2558: Simple Job Board <= 2.9.6 Information Disclosure
CVE-2022-2558 - 6.1CVE-2017-18498: Simple Job Board <= 2.4.4 Reflected XSS
CVE-2017-18498 - 5.8CVE-2023-47188: Simple Job Board <= 2.10.5 Missing Authorization
CVE-2023-47188 - 5.5CVE-2021-39328: Simple Job Board <= 2.9.4 Stored Cross-Site Scripting
CVE-2021-39328 - 5.3CVE-2025-59579: Simple Job Board <= 2.13.7 Info Exposure
CVE-2025-59579 - 5.3CVE-2024-7762: Simple Job Board <= 2.12.5 Resumes Download
CVE-2024-7762 - 5.3CVE-2024-0593: Simple Job Board Unauthenticated Information Disclosure
CVE-2024-0593
Vulnerability data © Defiant, Inc., provided under the Wordfence Intelligence T&C