CVE-2025-3921
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 PeproDev Ultimate Profile Solutions plugin for WordPress is vulnerable to unauthorized modification of data due to a missing capability check on the handel_ajax_req() function in versions 1.9.1 to 7.5.2. This makes it possible for unauthenticated attackers to update arbitrary user's metadata which can be leveraged to block an administrator from accessing their site when wp_capabilities is set to 0.
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 PeproDev Ultimate Profile Solutions WordPress plugin has a missing capability check in the handel_ajax_req() function, allowing unauthenticated attackers to update arbitrary user metadata. Attackers can set wp_capabilities to 0 for any user, effectively revoking administrator privileges and blocking site access.
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
- Low
- Privileges
- None
- User interaction
- None
- Scope
- Unchanged
- Confidentiality
- None
- Integrity
- High
- Availability
- Low
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:L
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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Confirm plugin installationCheck if PeproDev Ultimate Profile Solutions plugin is installed on the WordPress site by looking in wp-content/plugins/ for a folder containing 'ultimate-profile' or 'peprodev' in the name, or query the wp_options table for the active_plugins optionAffected if Plugin folder or database entry exists and the plugin is active
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Determine installed versionRead the main plugin PHP file header for the 'Version' field, or check the plugins API/WordPress admin plugins listAffected if Version number is present and less than 7.5.3 (e.g., 7.5.2, 7.5.1, 7.5.0, or any version below 7.5.3)
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Locate vulnerable functionSearch the plugin files for the function named handel_ajax_req (note the spelling with single 'l')Affected if The function handel_ajax_req exists in the plugin code
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Verify unauthenticated AJAX hook registrationSearch plugin files for add_action('wp_ajax_pepro_ajax' or similar AJAX hooks, and verify there is no current_user_can capability check before user metadata modificationAffected if A wp_ajax action is hooked without a capability check, allowing unauthenticated access to user metadata updates
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Check for compromised admin accountsQuery the wp_usermeta table for any users with wp_capabilities set to 0, or verify admin users can still log inAffected if Any administrator account has wp_capabilities set to 0 or cannot authenticate as an administrator
The environment is affected if the PeproDev Ultimate Profile Solutions plugin is installed with a version lower than 7.5.3 and the handel_ajax_req function is present with unauthenticated AJAX access.
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 the plugin to version 7.5.3 or later to patch the vulnerability. If the site has already been compromised, restore from a clean backup and reset all admin passwords.
- Consultation2.0 h
- Implementation1.0 h
- Testing2.0 h
- Review / QA1.0 h
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Scan for this in your stack
Free · runs locallyCheck whether your project pulls in CVE-2025-3921 — 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-2025-3921 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