---
title: "CVE-2026-80513: wpForo Forum WordPress plugin - Insecure Deserialization"
description: "wpForo Forum WordPress plugin < 3.1.6 contains an insecure deserialization vulnerability caused by unrestricted class instantiation during deserialization of user-supplied profile field values, letting authenticated users with Subscriber-level access inject PHP objects, potentially leading to remote code execution if a POP chain is present."
url: https://panop.io/threat-heartbeat/CVE-2026-80513/
---

# CVE-2026-80513 wpForo Forum WordPress plugin - Insecure Deserialization

wpForo Forum WordPress plugin < 3.1.6 contains an insecure deserialization vulnerability caused by unrestricted class instantiation during deserialization of user-supplied profile field values, letting authenticated users with Subscriber-level access inject PHP objects, potentially leading to remote code execution if a POP chain is present.

CVSS base score 7.5 /10

High

CISA KEV

Not listed

Public exploit

None known

Authentication

Required

EPSS

0.31% chance of exploitation in 30 days

[View the NVD record ↗](https://nvd.nist.gov/vuln/detail/CVE-2026-80513)

## Details

Type

Insecure Deserialization

Impact

Remote Code Execution, File System Write, SQL Injection

CVSS vector

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

Published

24 September 2026

Updated

15 October 2026

Weakness

[CWE-502](https://cwe.mitre.org/data/definitions/502.html)

## Vendor fix

Upgrade to version 3.1.6 or later.

Patching closes this CVE. It does not tell you which of your systems run the affected version, or what else is exposed alongside them.

## References

- [https://nvd.nist.gov/vuln/detail/CVE-2026-80513](https://nvd.nist.gov/vuln/detail/CVE-2026-80513)
- [https://wpscan.com/vulnerability/09c9b9e7-c178-4f05-80d8-d4d77b7c5050/](https://wpscan.com/vulnerability/09c9b9e7-c178-4f05-80d8-d4d77b7c5050/)

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## What this record can't tell you

- Whether you run the affected software, and where
- Whether an attacker can actually reach and exploit it
- The misconfigurations that never get a CVE number
- What it would cost the business, ranked into what to fix first

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