SlimStat Analytics < 5.4.0 - Unauthenticated PHP Object Injection

8.1
Deserialization of Untrusted Data
CVE CVE-2026-27410
CVSS 8.1 (High)
Publicly Published June 1, 2026
Last Updated June 11, 2026
Researcher Drew Webber (mcdruid)

Description

The SlimStat Analytics plugin for WordPress is vulnerable to PHP Object Injection in all versions up to 5.4.0 (exclusive) via deserialization of untrusted input. This makes it possible for unauthenticated attackers to inject a PHP Object. No known POP chain is present in the vulnerable software, which means this vulnerability has no impact unless another plugin or theme containing a POP chain is installed on the site. If a POP chain is present via an additional plugin or theme installed on the target system, it may allow the attacker to perform actions like delete arbitrary files, retrieve sensitive data, or execute code depending on the POP chain present.

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Vulnerability Details for SlimStat Analytics

Software Type Plugin
Software Slug wp-slimstat (view on wordpress.org)
Patched? Yes
Remediation Update to version 5.4.0, or a newer patched version
Affected Version
  • < 5.4.0
Patched Version
  • 5.4.0

Recent vulnerabilities in SlimStat Analytics

# Title CVE ID CVSS Researchers Date
1 SlimStat Analytics <= 5.4.11 - Authenticated (Subscriber+) SQL Injection CVE-2026-54818 6.5 hhhai June 17, 2026
2 SlimStat Analytics <= 5.4.11 - Unauthenticated Stored Cross-Site Scripting via User-Agent Header CVE-2026-7634 7.2 Supakiad S. (m3ez) May 27, 2026
3 SlimStat Analytics <= 5.3.5 - Unauthenticated Stored Cross-Site Scripting via 'fh' CVE-2026-1238 7.2 Supakiad S. (m3ez) March 18, 2026
4 SlimStat Analytics <= 5.3.1 - Authenticated (Subscriber+) SQL Injection via `args` Parameter CVE-2025-13431 6.5 Marcin Dudek (dudekmar) February 10, 2026
5 Slimstat Analytics <= 5.3.2 - Reflected Cross-Site Scripting CVE-2025-69323 6.1 Drew Webber (mcdruid) January 27, 2026
6 SlimStat Analytics <= 5.3.3 - Unauthenticated Stored Cross-Site Scripting via 'fh' Parameter CVE-2025-15057 7.2 Supakiad S. (m3ez) January 8, 2026
7 SlimStat Analytics <= 5.3.4 - Unauthenticated Stored Cross-Site Scripting via 'notes/resource' Parameters CVE-2025-15055 7.2 Supakiad S. (m3ez) January 8, 2026
8 SlimStat Analytics <= 5.3.2 - Unauthenticated Stored Cross-Site Scripting CVE-2025-14151 7.2 Supakiad S. (m3ez) December 18, 2025
9 Slimstat Analytics <= 5.2.6 - Unauthenticated Stored Cross-Site Scripting CVE-2024-9548 7.2 Bilal Chawich (Duke) October 14, 2024
10 SlimStat Analytics <= 5.1.3 - Authenticated (Subscriber+) Stored Cross-Site Scripting CVE-2024-1073 6.4 Lucio Sá February 1, 2024

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