CVE-2025-4126

MEDIUM

EG-Series <= 2.1.1 - Authenticated Stored Cross-Site Scripting via Shortcode Title Attribute

Title source: llm
STIX 2.1

Exploitation Summary

EIP tracks 1 public exploit for CVE-2025-4126. PoCs published by Slow-Mist.

AI-analyzed exploit summary This repository contains a Proof of Concept (PoC) demonstrating a reentrancy attack vulnerability in Ethereum smart contracts. It includes vulnerable and attacker contracts, along with a Hardhat test script to simulate the attack.

Description

The EG-Series plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the plugin's [series] shortcode in all versions up to, and including, 2.1.1 due to insufficient input sanitization and output escaping on user supplied attributes in the shortcode_title function. This makes it possible for authenticated attackers - with contributor-level access and above, on sites with the Classic Editor plugin activated - to inject arbitrary JavaScript code in the titletag attribute that will execute whenever a user access an injected page.

Exploits (1)

nomisec WORKING POC
by Slow-Mist · poc
https://github.com/Slow-Mist/CVE-2025-4126

This repository contains a Proof of Concept (PoC) demonstrating a reentrancy attack vulnerability in Ethereum smart contracts. It includes vulnerable and attacker contracts, along with a Hardhat test script to simulate the attack.

Classification
Working Poc 95%
Attack Type
Other
Complexity
Moderate
Reliability
Reliable
Target: Ethereum smart contracts (VulnerableBank.sol)
No auth needed
Prerequisites: Ethereum development environment (e.g., Hardhat) · Basic understanding of smart contract vulnerabilities
devstral-2 · analyzed Feb 16, 2026 Full analysis →

Scores

CVSS v3 6.4
EPSS 0.0024
EPSS Percentile 15.0%
Attack Vector NETWORK
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N

CISA SSVC

Vulnrichment
Exploitation none
Automatable no
Technical Impact partial

Details

CWE
CWE-80
Status published
Products (1)
emmanuelg/EG-Series < 2.1.1
Published May 15, 2025
Tracked Since Feb 18, 2026