CVE-2026-11784

MEDIUM

Optimole < 4.2.6 - CSRF

Title source: rule
STIX 2.1

Exploitation Summary

EIP tracks 1 public exploit for CVE-2026-11784. PoCs published by AlexMihailEngineer.

AI-analyzed exploit summary The repository contains a functional CSRF exploit for CVE-2026-11784, targeting the Optimole WordPress plugin. The exploit demonstrates arbitrary file overwrite via a crafted HTML form that bypasses nonce validation and includes a valid 1x1 JPEG payload.

Description

The Optimole – Optimize Images | Convert WebP & AVIF | CDN & Lazy Load | Image Optimization plugin for WordPress is vulnerable to Cross-Site Request Forgery in all versions up to, and including, 4.2.6. This is due to missing or incorrect nonce validation on the replace_file function. This makes it possible for unauthenticated attackers to overwrite existing media attachments with attacker-supplied file content by supplying a forged multipart POST request targeting any attachment the victim has edit_post capability over via a forged request granted they can trick a site administrator into performing an action such as clicking on a link. The forged request requires a victim with at least Author-level privileges, as the handler enforces a current_user_can('edit_post', $id) check; tricking an Author-level or higher user into clicking a crafted link is sufficient to trigger the overwrite against attachments that user can edit.

Exploits (1)

github WORKING POC
by AlexMihailEngineer · htmlpoc
https://github.com/AlexMihailEngineer/CVE-2026-11784-Optimole-CSRF

The repository contains a functional CSRF exploit for CVE-2026-11784, targeting the Optimole WordPress plugin. The exploit demonstrates arbitrary file overwrite via a crafted HTML form that bypasses nonce validation and includes a valid 1x1 JPEG payload.

Classification
Working Poc 95%
Attack Type
Csrf
Complexity
Moderate
Reliability
Reliable
Target: Optimole WordPress Plugin (versions <= 4.2.5)
No auth needed
Prerequisites: Target WordPress site with Optimole plugin <= 4.2.5 · Victim user with edit_post capability
devstral-2 · analyzed Jun 19, 2026 Full analysis →

Scores

CVSS v3 4.3
EPSS 0.0013
EPSS Percentile 2.9%
Attack Vector NETWORK
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:N

CISA SSVC

Vulnrichment
Exploitation none
Automatable no
Technical Impact partial

Details

CWE
CWE-352
Status published
Products (1)
optimole/Optimole – Optimize Images | Convert WebP & AVIF | CDN & Lazy Load | Image Optimization < 4.2.6
Published Jun 18, 2026
Tracked Since Jun 18, 2026