CVE-2025-12028

HIGH

IndieAuth plugin for WordPress <4.5.4 - CSRF

Title source: llm
STIX 2.1

Exploitation Summary

EIP tracks 1 public exploit for CVE-2025-12028. PoCs published by jFriedli.

AI-analyzed exploit summary This PoC demonstrates an OAuth authorization code interception vulnerability in WordPress's IndieAuth plugin. It exploits a CSRF-like attack to steal authorization codes and exchange them for access tokens, allowing an attacker to impersonate a victim within granted scopes.

Description

The IndieAuth plugin for WordPress is vulnerable to Cross-Site Request Forgery in all versions up to, and including, 4.5.4. This is due to missing nonce verification on the `login_form_indieauth()` function and the authorization endpoint at wp-login.php?action=indieauth. This makes it possible for unauthenticated attackers to force authenticated users to approve OAuth authorization requests for attacker-controlled applications via a forged request granted they can trick a user into performing an action such as clicking on a link or visiting a malicious page while logged in. The attacker can then exchange the stolen authorization code for an access token, effectively taking over the victim's account with the granted scopes (create, update, delete).

Exploits (1)

nomisec WORKING POC
by jFriedli · poc
https://github.com/jFriedli/CVE-2025-12028

This PoC demonstrates an OAuth authorization code interception vulnerability in WordPress's IndieAuth plugin. It exploits a CSRF-like attack to steal authorization codes and exchange them for access tokens, allowing an attacker to impersonate a victim within granted scopes.

Classification
Working Poc 95%
Attack Type
Auth Bypass
Complexity
Moderate
Reliability
Reliable
Target: WordPress with IndieAuth plugin (version not specified)
Auth required
Prerequisites: Victim must be logged into WordPress · Attacker must host a malicious page on a controlled server · Victim must visit the attacker's page in the same browser session
devstral-2 · analyzed Apr 28, 2026 Full analysis →

Scores

CVSS v3 8.8
EPSS 0.0017
EPSS Percentile 6.9%
Attack Vector NETWORK
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

CISA SSVC

Vulnrichment
Exploitation none
Automatable no
Technical Impact total

Details

CWE
CWE-352
Status published
Products (1)
indieweb/IndieAuth < 4.5.4
Published Oct 24, 2025
Tracked Since Feb 18, 2026