CVE-2026-49781
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 · uneditedUnauthenticated PHP Object Injection in OttoKit <= 1.1.27 versions.
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 confidenceUnauthenticated PHP Object Injection vulnerability in OttoKit plugin versions 1.1.27 and below. The flaw allows remote attackers to inject malicious PHP objects via unserialized user input, potentially achieving remote code execution by leveraging magic methods in the application or dependent libraries.
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
- High
- Integrity
- High
- Availability
- High
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/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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Verify OttoKit plugin installationCheck your WordPress site's plugins directory or admin panel for the OttoKit plugin presence. In WordPress, you can query the wp_options table: SELECT option_value FROM wp_options WHERE option_name = 'active_plugins';Affected if OttoKit plugin is not installed or is not active on the site
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Determine installed OttoKit versionCheck the plugin header in main plugin file (typically /wp-content/plugins/ottokit/ includes a version comment). Alternatively, query: SELECT option_value FROM wp_options WHERE option_name = 'ottokit_version' OR option_name LIKE '%ottokit%';Affected if The installed version is 1.1.27 or lower, or version cannot be determined (older than 1.1.28)
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Identify if plugin exposes vulnerable unserialize handlerReview OttoKit source code for usage of unserialize() on user-supplied data, typically in AJAX endpoints, REST API routes, or form handlers. Search for patterns like: unserialize($_POST[...]), unserialize($_GET[...]), or unserialize($raw_data).Affected if Code contains unserialize() calls processing external input without prior sanitization
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Check access to unserialize entry pointsIdentify public-facing endpoints that accept serialized data. Review AJAX actions registered by OttoKit (wp_ajax_* and wp_ajax_nopriv_* hooks) that handle serialized object input. Log outgoing requests for any unserialize-related activity.Affected if Public AJAX endpoints or REST routes accepting serialized data are accessible without authentication
You are affected if OttoKit plugin versions 1.1.27 or below is installed and active, and the plugin contains code that uses unserialize() on unauthenticated user input.
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 OttoKit to version 1.1.28 or later. If patching is not immediately possible, disable the plugin or implement web application firewall rules to block serialized object payloads in requests.
- Consultation2.0 h
- Implementation4.0 h
- Testing3.0 h
- Review / QA1.0 h
An estimate, not a bill — we confirm scope with you before any work starts. Need it this week? Rush from $2,800.
Scan for this in your stack
Free · runs locallyCheck whether your project pulls in CVE-2026-49781 — 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-2026-49781 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