CVE-2025-58806
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 · uneditedCross-Site Request Forgery (CSRF) vulnerability in Tom Longridge WordPress Error Monitoring by Bugsnag bugsnag allows Stored XSS.This issue affects WordPress Error Monitoring by Bugsnag: from n/a through <= 1.6.3.
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 · moderate confidenceThis is a CSRF vulnerability in the WordPress Error Monitoring by Bugsnag plugin (versions <= 1.6.3) that allows attackers to inject malicious JavaScript (Stored XSS). An unauthenticated attacker can trick a logged-in administrator into clicking a crafted link or form submission, which then stores malicious scripts in the WordPress database that execute whenever users view affected pages.
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
- Required
- Scope
- Changed
- Confidentiality
- Low
- Integrity
- Low
- Availability
- Low
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/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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Identify installed Bugsnag plugin versionNavigate to WordPress admin dashboard > Plugins > Installed Plugins > look for 'Error Monitoring by Bugsnag' and note the version number displayed below the plugin nameAffected if Version listed is 1.6.3 or lower
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Verify plugin is activeCheck the status column in the Plugins list - the plugin must be both installed AND active for the vulnerability to be exploitableAffected if Plugin shows as 'Active' status
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Inspect database for suspicious stored scriptsQuery WordPress options table (wp_options or similar prefix) for any rows where option_name contains 'bugsnag' or similar, and option_value contains script tags, iframe tags, or encoded JavaScript patterns (like <script, eval(, document.cookie, onerror=, etc.)Affected if Any option records contain obfuscated script content that was not intentionally added by administrators
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Review plugin code for missing CSRF protectionsAccess plugin files via FTP or file manager, locate form handlers and AJAX action callbacks (typically in main plugin PHP file), search for presence of 'wp_nonce_field', 'check_ajax_referer', or 'check_admin_referer' function calls around form processing logicAffected if Form submission handlers exist but contain no nonce verification calls, indicating missing CSRF tokens
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Check for unauthorized admin user accountsIn WordPress admin > Users, review all administrator accounts - verify no accounts were created by attackers that you did not createAffected if Unknown administrator accounts exist in the users table
You are affected if the Bugsnag plugin version is 1.6.3 or lower AND the plugin is active, especially if nonce verification is missing from its form handlers or suspicious scripts appear in the database.
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 the latest version which should include anti-CSRF tokens (nonces) for all form submissions and AJAX actions to prevent unauthorized requests from being processed.
- Consultation3.0 h
- Implementation6.0 h
- Testing3.0 h
- Review / QA2.0 h
An estimate, not a bill — we confirm scope with you before any work starts. Need it this week? Rush from $3,984.
Scan for this in your stack
Free · runs locallyCheck whether your project pulls in CVE-2025-58806 — 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-2025-58806 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