CVE-2025-2111
Official description Straight from the sourceThe vendor's or NVD's own wording, published unedited. Authoritative, but often terse — it says what broke, rarely what to do.
NVD · uneditedThe Insert Headers And Footers plugin for WordPress is vulnerable to Cross-Site Request Forgery in all versions up to, and including, 3.1.1. This is due to missing or incorrect nonce validation on the 'custom_plugin_set_option' function. This makes it possible for unauthenticated attackers to update arbitrary options on the WordPress site via a forged request granted they can trick a site administrator into performing an action such as clicking on a link. This can be leveraged to update the default role for registration to administrator and enable user registration for attackers to gain administrative user access to a vulnerable site. The 'WPBRIGADE_SDK__DEV_MODE' constant must be set to 'true' to exploit the vulnerability.
Technical summary Written by usOur analysis, written from the advisory, the CVSS vector and the affected-version data. It adds context the advisory leaves out, and never invents facts that are not in the source.
dbcve analysis · high confidenceThe Insert Headers And Footers WordPress plugin (versions up to 3.1.1) lacks proper nonce validation on its custom_plugin_set_option function, enabling CSRF attacks. When the WPBRIGADE_SDK__DEV_MODE constant is set to 'true', unauthenticated attackers can trick administrators into clicking malicious links that forge requests to modify WordPress options—including changing the default registration role to administrator and enabling user registration, allowing attacker-created admin accounts.
Verify against the referenced sources before acting — the references below are authoritative for this CVE, this summary is not.
CVSS breakdown How the score is builtThe industry scoring standard. It rates how the flaw is reached, what it takes to exploit, and what an attacker gains — the score is derived from those, not the other way round.
From the vector- Attack vector
- Network
- Complexity
- High
- Privileges
- None
- User interaction
- Required
- Scope
- Unchanged
- Confidentiality
- High
- Integrity
- High
- Availability
- High
CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H
Am I affected? How to checkSteps we derive from the advisory and the affected-version data, so you can decide whether this CVE reaches your setup. They are a guide, not a scan — your own configuration is the authority.
dbcve checksWork through these to decide whether this CVE applies to you.
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Check installed plugin versionNavigate to Plugins > Installed Plugins in WordPress admin, locate 'Insert Headers And Footers', and note the version number. Alternatively, check the plugin's main PHP file header for the Version: field.Affected if The installed version is 3.1.1 or earlier (any version up to and including 3.1.1).
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Verify WPBRIGADE_SDK__DEV_MODE constantSearch the wp-config.php file, theme functions.php, or any active plugin files for the line: define('WPBRIGADE_SDK__DEV_MODE', true); or define( 'WPBRIGADE_SDK__DEV_MODE', 'true' );Affected if The constant WPBRIGADE_SDK__DEV_MODE is defined and set to 'true' (string or boolean).
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Inspect WordPress registration settingsGo to Settings > General in WordPress admin and check 'Membership: Anyone can register' and 'Default Role'. Or query the database: SELECT option_name, option_value FROM wp_options WHERE option_name IN ('users_can_register', 'default_role'); (table prefix may vary).Affected if 'Anyone can register' is enabled AND 'Default Role' is set to 'Administrator', or these settings were changed unexpectedly.
You are affected if the Insert Headers And Footers plugin version is 3.1.1 or earlier AND the WPBRIGADE_SDK__DEV_MODE constant is set to 'true' in your environment.
Generated from the published advisory. Verify against your own configuration.
Remediation Closing itWhat it takes to close this. Where a vendor fix exists we point at it; where none exists we say so plainly, and can build one. Effort estimates are scoped from the advisory, not from your codebase.
From vendor dataUpdate to plugin version 3.1.2 or later which contains the nonce validation fix. Additionally, ensure the WPBRIGADE_SDK__DEV_MODE constant is not set to 'true' in production environments.
- Consultation1.0 h
- Implementation1.0 h
- Testing1.0 h
- Review / QA1.0 h
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Free · runs locallyCheck whether your project pulls in CVE-2025-2111 — or any other known-vulnerable package — straight from your lock files. Free and open source; it runs locally and uploads nothing.
References Go to the primary sourcePrimary sources — vendor advisories, patches and trackers. Where our summary and a reference disagree, the reference wins.
Primary sourcesPractitioner notes
ContributedPeer-ranked notes from engineers who’ve handled CVE-2025-2111 in production — separate from our analysis above.
The advisory tells you what broke. It rarely tells you what actually worked. If you’ve dealt with this one, that detail is what the next engineer is searching for.
- The version that genuinely resolved it — not the one the vendor claimed
- A config change or rule that shut the vector down
- A gotcha in the upgrade path that cost you an afternoon
No notes yet
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- Verified mitigations, workarounds, and config changes
- Version or environment caveats, and links to real fixes
- No weaponised exploit code, or anything meant to cause harm
- No spam, self-promotion, credentials, or personal data