Critical

Authentication Bypass in Spirit Framework for WordPress

IdentifiersCVE-2025-6388CWE-288· Authentication Bypass Using an…

CVE-2025-6388 is a critical authentication bypass vulnerability in the Spirit Framework plugin for WordPress affecting all versions up to and including 1.2.14. The flaw is caused by improper identity validation in the plugin’s custom_actions() function, which implements authentication logic outside WordPress’s standard authentication flow. Due to insufficient validation of the requesting user’s identity before issuing authentication, an unauthenticated attacker who knows a valid username can log in as that user without the corresponding password. This includes administrator accounts, enabling direct compromise of privileged WordPress users and potential full site takeover.

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ANALYST BRIEF

Impact, mitigation & remediation

What it means. What to do now. Patch path, mitigations, and the assume-compromise checklist.

Impact

What an attacker gets, and what they’ve been doing with it.

Successful exploitation allows unauthenticated account takeover of any known user account in the affected WordPress site, including administrator accounts. This can lead to immediate privilege escalation, full administrative control of the site, installation of backdoors, malicious content injection, website defacement, malware deployment, and theft or manipulation of site data. The content also indicates the vulnerability is being actively exploited in the wild.

Mitigation

If you can’t patch tonight, do this now.

If immediate patching is not possible, reduce exposure by disabling the Spirit Framework plugin until it can be updated, restricting access to WordPress administrative interfaces, monitoring for unexpected logins and newly created administrator sessions, rotating credentials for privileged accounts, and reviewing the site for indicators of compromise such as unauthorized admin users, backdoors, malicious content changes, or unfamiliar plugins/themes. Because exploitation only requires a valid username, administrators should assume elevated risk on publicly accessible sites until patched.

Remediation

Patch, then assume compromise.

Upgrade the Spirit Framework plugin to version 1.2.15 or later. According to the provided content, version 1.2.15 fixes the issue by adding stricter validation in custom_actions() to ensure user identities are properly authenticated before access is granted. Any installation running version 1.2.14 or earlier should be considered vulnerable and updated immediately.

PUBLIC EXPLOITS

Exploits

No public exploits tracked yet. Mallory keeps watching.

VALID 0 / 0 TOTALView more in app

No public exploit code observed for this vulnerability.

ACTIVITY FEED

Recent activity

8 sources tracked across advisories, community write-ups, and news. New activity surfaces here as Mallory finds it.

8 SOURCESView more in app

security online infoNews

Oct 3, 2025

Actively Exploited: Critical Flaw CVE-2025-6388 (CVSS 9.8) Allows Authentication Bypass in WordPress Plugin

A critical authentication bypass vulnerability in the Spirit Framework plugin for WordPress caused by improper identity validation in the custom_actions() function, allowing attackers who know a valid username to log in without a password and potentially escalate privileges.

zeropath blogNews

Oct 3, 2025

Spirit Framework WordPress Plugin CVE-2025-6388: Brief Summary of a Critical Authentication Bypass - ZeroPath Blog | ZeroPath

A critical authentication bypass vulnerability in the Spirit Framework WordPress plugin that allows unauthenticated attackers to log in as any user, including administrators, leading to privilege escalation and full site takeover.

What this page doesn’t show

The version that knows your environment.

This page is what’s public. Mallory adds the parts that aren’t: which of your assets are affected, which adversaries are exploiting it right now, which detections to deploy, and what to do tonight.

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Exposure mapping

Query your assets running an affected version, and investigate the blast radius.

Threat actor evidence

Every observed campaign linking this CVE to a named adversary.

Associated malware

Malware families riding this exploit, with evidence and IOCs.

Detection signatures

YARA, Sigma, Snort, and vendor rules, auto-deployed to your SIEM.

Vendor-by-vendor mapping

Cross-references every affected SKU, including bundled OEM variants.

Social activity6