CVE-2020-35749

Simple Job Board <= 2.9.3 - Local File Inclusion

2022-02-06 00:00
Ven3xy

Strategic Overview

Status
Patched in 2.9.4
Affected Plugin
Simple Job Board
Affected Version
<= 2.9.3
CVSS
7.7High
Weakness type
CWE-98 · Improper Control of Filename for Include/Require Statement in PHP Program ('PHP Remote File Inclusion')
CVE
CVE-2020-35749
View all Simple Job Board vulnerabilities

At a glance

CVE-2020-35749 is a high-severity Improper Control of Filename for Include/Require Statement in PHP Program ('PHP Remote File Inclusion') vulnerability in the Simple Job Board WordPress plugin, affecting versions <= 2.9.3. It carries a CVSS score of 7.7 (reachable over the network; low attack complexity; high confidentiality impact). The issue is fixed in version 2.9.4; sites on affected versions should update now. Disclosed February 2022, reported by Ven3xy.

Vulnerability Overview

Directory traversal vulnerability in class-simple_job_board_resume_download_handler.php in the Simple Board Job plugin 2.9.3 and earlier for WordPress allows remote attackers to read arbitrary files via the sjb_file parameter to wp-admin/post.php.

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 interaction from a victim user. A successful exploit has high impact on confidentiality.

CWE-98: Improper Control of Filename for Include/Require Statement in PHP Program ('PHP Remote File Inclusion')

Reaching this weakness in Simple Job Board <= 2.9.3 takes a caller who can reach the endpoint. PHP file inclusion means a path used by include or require is built from request data, so the file that gets executed is under the caller's influence.

Including an attacker-influenced file executes its contents, which is why this class is routinely chained with an upload or log-poisoning step to reach code execution. For Simple Job Board the fix is 2.9.4: builds <= 2.9.3 are affected, anything from 2.9.4 onward is not.

Remediation

Update to version 2.9.4, or a newer patched version

How does WordSec protect against this?

The attempt arrives as an ordinary request to Simple Job Board: 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 2.9.4 closes this, and updating the plugin is the step that ends it.

  • Firewall
  • Scanner
  • Alerts

External References

https://www.cve.org/CVERecord?id=CVE-2020-35749https://www.wordfence.com/threat-intel/vulnerabilities/id/31f6032a-19f8-463b-9642-cba205069a22https://nvd.nist.gov/vuln/detail/CVE-2020-35749

Related records

Vulnerability data © Defiant, Inc., provided under the Wordfence Intelligence T&C