What is the CVSS score of CVE-2023-5877?

CVE-2023-5877 has a CVSS 3.1 base score of 9.8 (Critical). CVSS vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H. EPSS exploitation probability: 0.4%.

Which versions of PHP are affected by CVE-2023-5877?

Organizations using affiliate-toolkit WordPress face critical risk from CVE-2023-5877, a missing authorization vulnerability rated CVSS 9.8.

Is there a public PoC exploit available for CVE-2023-5877?

Yes, a public proof-of-concept exploit is available for CVE-2023-5877. Prioritise patching immediately. EPSS: 0.4%.

How to fix or mitigate CVE-2023-5877?

Within 24 hours: Identify all affected systems and apply vendor patches immediately. Monitor vendor channels for patch availability.

PHP CVE-2023-5877

CRITICAL

Missing Authorization (CWE-862)

2024-01-01 contact@wpscan.com

SSRF Authentication Bypass WordPress PHP Affiliate Toolkit

9.8

CVSS 3.1 · NVD

Severity by source

NVD PRIMARY

9.8 CRITICAL

AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Primary rating from NVD · only source for this CVE.

CVSS VectorNVD

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

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

High

Availability

High

Lifecycle Timeline

Analysis Generated

Mar 28, 2026 - 19:32 vuln.today

PoC Detected

Jun 03, 2025 - 15:15 vuln.today

Public exploit code

CVE Published

Jan 01, 2024 - 15:15 nvd

CRITICAL 9.8

DescriptionCVE.org

The affiliate-toolkit WordPress plugin before 3.4.3 lacks authorization and authentication for requests to it's affiliate-toolkit-starter/tools/atkp_imagereceiver.php endpoint, allowing unauthenticated visitors to make requests to arbitrary URL's, including RFC1918 private addresses, leading to a Server Side Request Forgery (SSRF) issue.

AnalysisAI

The affiliate-toolkit WordPress plugin before 3.4.3 lacks authorization and authentication for requests to it's affiliate-toolkit-starter/tools/atkp_imagereceiver.php endpoint, allowing. Rated critical severity (CVSS 9.8), this vulnerability is remotely exploitable, no authentication required, low attack complexity. Public exploit code available and no vendor patch available.

Technical ContextAI

This vulnerability is classified as Missing Authorization (CWE-862), which allows attackers to access resources or perform actions without proper authorization checks. The affiliate-toolkit WordPress plugin before 3.4.3 lacks authorization and authentication for requests to it's affiliate-toolkit-starter/tools/atkp_imagereceiver.php endpoint, allowing unauthenticated visitors to make requests to arbitrary URL's, including RFC1918 private addresses, leading to a Server Side Request Forgery (SSRF) issue. Affected products include: Servit Affiliate-Toolkit. Version information: before 3.4.3.

RemediationAI

No vendor patch is available at time of analysis. Monitor vendor advisories for updates. Implement role-based access control, validate authorization on every request server-side, apply principle of least privilege.