CVE-2026-1238

HIGH

SlimStat Analytics <= 5.3.5 - Unauthenticated Stored Cross-Site Scripting via 'fh'

Title source: cna
STIX 2.1

Exploitation Summary

EIP tracks 1 public exploit for CVE-2026-1238. PoCs published by mrk336.

AI-analyzed exploit summary This repository provides a detailed technical analysis of CVE-2026-1238, an AWS IAM privilege escalation vulnerability caused by mis-evaluated policy conditions. It includes root cause analysis, attack paths, detection strategies, and mitigation steps.

Description

The SlimStat Analytics plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the 'fh' (fingerprint) parameter in all versions up to, and including, 5.3.5 due to insufficient input sanitization and output escaping. This makes it possible for unauthenticated attackers to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page.

Exploits (1)

github WRITEUP
by mrk336 · poc
https://github.com/mrk336/Breaking-AWS-IAM-Privilege-Escalation-via-Mis-Evaluated-Policy-Conditions-CVE-2026-1238-

This repository provides a detailed technical analysis of CVE-2026-1238, an AWS IAM privilege escalation vulnerability caused by mis-evaluated policy conditions. It includes root cause analysis, attack paths, detection strategies, and mitigation steps.

Classification
Writeup 95%
Attack Type
Auth Bypass
Complexity
Moderate
Reliability
Reliable
Target: AWS IAM Policy Evaluation Engine
Auth required
Prerequisites: Initial foothold within a trusted AWS account · Discovery of cross-account trust relationships
devstral-2 · analyzed Jun 05, 2026 Full analysis →

References (4)

Core 4

Scores

CVSS v3 7.2
EPSS 0.0013
EPSS Percentile 32.2%
Attack Vector NETWORK
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:N

CISA SSVC

Vulnrichment
Exploitation none
Automatable yes
Technical Impact partial

Details

CWE
CWE-79
Status published
Products (1)
veronalabs/SlimStat Analytics < 5.3.5
Published Mar 19, 2026
Tracked Since Mar 19, 2026