---
title: "CVE-2026-97283: Liquid Web / StellarWP Advanced Post Manager - Insecure Deserialization"
description: "Liquid Web / StellarWP Advanced Post Manager <= 4.5.5 contains an insecure deserialization vulnerability caused by untrusted data deserialization, letting attackers perform object injection remotely, exploit requires crafted input."
url: https://panop.io/threat-heartbeat/CVE-2026-97283/
---

# CVE-2026-97283 Liquid Web / StellarWP Advanced Post Manager - Insecure Deserialization

Liquid Web / StellarWP Advanced Post Manager <= 4.5.5 contains an insecure deserialization vulnerability caused by untrusted data deserialization, letting attackers perform object injection remotely, exploit requires crafted input.

CVSS base score 9.8 /10

Critical

CISA KEV

Not listed

Public exploit

None known

Authentication

Not required

EPSS

0.36% chance of exploitation in 30 days

[View the NVD record ↗](https://nvd.nist.gov/vuln/detail/CVE-2026-97283)

## Details

Type

Insecure Deserialization

Impact

Remote Code Execution

CVSS vector

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

Published

5 October 2026

Updated

15 October 2026

Weakness

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

## Vendor fix

Update to the latest version beyond 4.5.5.

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-2026-97283](https://nvd.nist.gov/vuln/detail/CVE-2026-97283)
- [https://patchstack.com/database/wordpress/plugin/advanced-post-manager/vulnerability/wordpress-advanced-post-manager-plugin-4-5-5-php-object-injection-vulnerability?\_s\_id=cve](https://patchstack.com/database/wordpress/plugin/advanced-post-manager/vulnerability/wordpress-advanced-post-manager-plugin-4-5-5-php-object-injection-vulnerability?_s_id=cve)

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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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