CVE-2020-36735

WP ERP | Complete HR solution with recruitment & job listings | WooCommerce CRM & Accounting <= 1.6.3 - Cross-Site Request Forgery Bypass

2020-09-26 00:00

Strategic Overview

Status: Patched in 1.6.4
Affected Plugin: ERP: Complete HR, Accounting & CRM Suite Built for WooCommerce
Affected Version: < 1.6.4
CVSS: 4.3Medium
Weakness type: CWE-352 · Cross-Site Request Forgery (CSRF)
CVE: CVE-2020-36735

View all ERP: Complete HR, Accounting & CRM Suite Built for WooCommerce vulnerabilities

At a glance

CVE-2020-36735 is a medium-severity Cross-Site Request Forgery (CSRF) vulnerability in the ERP WordPress plugin, affecting versions < 1.6.4. It carries a CVSS score of 4.3 (reachable over the network; low attack complexity). Exploitation requires no authentication. The issue is fixed in version 1.6.4; sites on affected versions should update now. Disclosed September 2020, reported by Jerome Bruandet.

Vulnerability Overview

The WP ERP | Complete HR solution with recruitment & job listings | WooCommerce CRM & Accounting plugin for WordPress is vulnerable to Cross-Site Request Forgery in versions up to, and including, 1.6.3. This is due to missing or incorrect nonce validation on the handle_leave_calendar_filter, add_enable_disable_option_save, leave_policies, process_bulk_action, and process_crm_contact functions. This makes it possible for unauthenticated attackers to modify the plugins settings via a forged request granted they can trick a site administrator into performing an action such as clicking on a link.

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.

CWE-352: Cross-Site Request Forgery (CSRF)

Reaching this weakness in ERP < 1.6.4 takes a caller who can reach the endpoint. Cross-site request forgery abuses the fact that browsers attach a victim's cookies to any request, so a state-changing action that only checks who you are, not whether you meant to act, can be triggered from another site.

An attacker who gets a logged-in user to load a crafted page can perform that action as them, with the impact scaling to whatever the victim's role is allowed to do. For ERP the fix is 1.6.4: builds < 1.6.4 are affected, anything from 1.6.4 onward is not.

Remediation

Update to version 1.6.4, or a newer patched version

How does WordSec protect against this?

The attempt arrives as an ordinary request to ERP: WordSec's web application firewall inspects request payloads before WordPress loads them. None of that substitutes for the fix: ERP 1.6.4 closes this, and updating the plugin is the step that ends it.

Firewall
Alerts

External References

https://www.cve.org/CVERecord?id=CVE-2020-36735 https://www.wordfence.com/threat-intel/vulnerabilities/id/01b90498-0ddb-4eb3-b76d-de30ed03d7d0 https://nvd.nist.gov/vuln/detail/CVE-2020-36735

Related records

Other vulnerabilities in ERP: Complete HR, Accounting & CRM Suite Built for WooCommerce

CVSS Vector

4.3

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:N

Base

Attack VectorNetwork
Attack ComplexityLow
Privileges RequiredNone
User InteractionRequired
ScopeUnchanged
ConfidentialityNone
IntegrityLow
AvailabilityNone

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