CVE-2025-31631
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 · uneditedDeserialization of Untrusted Data vulnerability in AncoraThemes Fish House fish-house allows Object Injection.This issue affects Fish House: from n/a through <= 1.2.7.
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 confidenceA deserialization vulnerability in the AncoraThemes Fish House WordPress theme (versions <= 1.2.7) allows attackers to inject malicious PHP objects by supplying untrusted serialized data. This object injection can lead to remote code execution when suitable 'gadget chains' exist within the application or loaded plugins.
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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Identify if Fish House theme is installedNavigate to wp-content/themes/ directory and check for fish-house folder. Read the theme's style.css or functions.php to find the version declaration.Affected if Fish House theme is present in the WordPress installation
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Locate unsafe unserialize() calls in theme codeSearch theme files for 'unserialize(' pattern, particularly in files that handle user-submitted data (e.g., form handlers, AJAX endpoints, shortcodes).Affected if The theme contains unserialize() calls processing external input
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Trace data flow to unserialize() callExamine the code path from where user input is received (POST/GET parameters, cookie values, HTTP headers) to the unserialize() function. Check if input is sanitized before reaching deserialization.Affected if Untrusted user-controlled data reaches the unserialize() function without proper validation
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Check installed version against known affected versionsRead the version number from the theme's main PHP file or style.css header. Compare against any version ranges mentioned in official vulnerability disclosures.Affected if Installed version falls within the vulnerable version range (if known) or theme uses unsafe deserialization
A user is affected if the Fish House theme is installed and contains unserialize() calls that process untrusted user input without sanitization.
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 Fish House theme to the latest patched version. If no patch is available, audit the theme code for unsafe unserialize() calls and replace with json_decode() or implement strict allowlist validation before deserialization.
- Consultation4.0 h
- Implementation8.0 h
- Testing6.0 h
- Review / QA4.0 h
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Free · runs locallyCheck whether your project pulls in CVE-2025-31631 — 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-2025-31631 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
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