CVE-2025-31429
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 themeton PressGrid - Frontend Publish Reaction & Multimedia Theme allows Object Injection. This issue affects PressGrid - Frontend Publish Reaction & Multimedia Theme: from n/a through 1.3.1.
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 of untrusted data vulnerability in the PressGrid theme allows remote attackers to inject malicious PHP objects via unserialize() on user-controlled data, potentially leading to arbitrary code execution.
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 PressGrid theme installationSearch your web root for PressGrid theme files, typically in wp-content/themes/ or similar theme directories. Look for theme configuration files containing 'PressGrid' or 'pressgrid' in the name or header.Affected if PressGrid theme is present in the WordPress theme directory or installed as a CMS theme.
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Locate unsafe unserialize() callsSearch the theme source code for 'unserialize(' function calls. Use grep or a code search tool: grep -r "unserialize(" /path/to/theme/Affected if Any unserialize() call is found that processes data from user input sources such as $_GET, $_POST, $_COOKIE, or database fields that can be influenced by users.
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Identify user-controlled data sources feeding unserializeExamine each unserialize() call found and trace back the data source. Check if the input comes from request parameters ($_REQUEST, $_GET, $_POST), cookies, user-modifiable database fields, or API inputs.Affected if The data passed to unserialize() originates directly or indirectly from any user-controlled source without sanitization.
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Verify the vulnerable code path is accessibleDetermine if the file containing the unsafe unserialize() is directly accessible via web request or is included by an accessible page. Check route handlers and includes.Affected if The script containing the vulnerable unserialize() can be invoked via HTTP request without authentication or with standard user privileges.
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Check theme version against known fixed versionInspect the theme's style.css or version file to obtain the current version number. Compare against the latest version available from the theme vendor.Affected if The installed version is older than the patched version released for CVE-2025-31429.
You are affected if the PressGrid theme is installed, contains an unserialize() call that processes user-controlled data, and that code path is accessible to attackers.
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 to the latest version of the PressGrid theme. If no update is available, replace unsafe unserialize() calls with secure alternatives like json_decode() and implement strict allowlist validation on any PHP deserialization entry points.
- Consultation4.0 h
- Implementation8.0 h
- Testing4.0 h
- Review / QA2.0 h
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Scan for this in your stack
Free · runs locallyCheck whether your project pulls in CVE-2025-31429 — 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-2025-31429 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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