CVE-2026-49768
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 Happyforms <= 1.26.13 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 · moderate confidenceUnauthenticated PHP Object Injection vulnerability in Happyforms WordPress plugin versions 1.26.13 and below. Attackers can exploit unsafe PHP unserialize() calls without authentication to potentially achieve remote code execution via malicious serialized objects.
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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Confirm Happyforms plugin is installedGo to WordPress admin > Plugins and look for 'Happyforms' in the installed plugins list, or check via wp-cli: wp plugin list --name=happyformsAffected if Happyforms plugin is not installed or is not active
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Check installed Happyforms versionIn WordPress admin > Plugins, click on Happyforms to view version details, or run: wp plugin list --name=happyforms --format=jsonAffected if Version is 1.26.13 or lower
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Identify exposed form submission endpointsReview site for Happyforms shortcodes or look for forms in wp-admin > Happyforms > Forms, note any public-facing form URLsAffected if Public forms exist that accept user input
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Inspect server logs for serialized data submissionsSearch access logs for requests to Happyforms endpoints containing patterns like 'O:','a:','s:' (PHP serialized object/array/string markers), e.g., grep -r 'O:%' /var/log/apache2/ or check WAF/IPS logsAffected if Logs show incoming requests with serialized PHP data to Happyforms endpoints
You are affected if Happyforms plugin version 1.26.13 or below is installed and active with a public-facing form endpoint that accepts user submissions.
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.
dbcve · scopedUpdate Happyforms plugin to version newer than 1.26.13; if immediate update is not possible, consider disabling the plugin or implementing WAF rules to block serialized object payloads.
Happyforms version 1.26.14 or later
- Log in to the WordPress admin dashboard
- Navigate to Plugins > Installed Plugins
- Locate Happyforms in the plugin list
- Click 'Update now' if an update is available, or manually download the latest version from wordpress.org and upload it
- After updating, verify the plugin is running version 1.26.14 or higher by checking the Plugins page
Generated from the published advisory — verify against the referenced sources before acting.
- Consultation2.0 h
- Implementation1.0 h
- Testing2.0 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 $1,696.
Scan for this in your stack
Free · runs locallyCheck whether your project pulls in CVE-2026-49768 — 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-2026-49768 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