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Deserialization of Untrusted DataWeakness · CWE-502

CVE-2026-39442

HIGH · 8.1 CVSS v3.1 Published 2026-06-17
Mitigation only
No fix yet — a mitigation exists. There is no fixed release. A documented workaround reduces exposure in the meantime.
See remediation →
90/100
Remediation priority · Urgent
Remotely reachable No privileges Zero-click

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 · unedited
Unauthenticated PHP Object Injection in PressMart <= 1.2.26 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 confidence

Unauthenticated PHP Object Injection vulnerability in PressMart e-commerce platform versions up to and including 1.2.26. The flaw allows remote attackers to inject malicious PHP objects via untrusted deserialized data without authentication, potentially leading to remote code execution.

MitigationUpgrade PressMart to a version beyond 1.2.26 or apply vendor-supplied patches. If immediate patching is not possible, implement strict input validation and disable untrusted deserialization functions.

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
High
Privileges
None
User interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High

CVSS:3.1/AV:N/AC:H/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 checks

Work through these to decide whether this CVE applies to you.

  1. Confirm PressMart theme is installed
    Navigate to Appearance > Themes in your WordPress admin dashboard and check if the PressMart theme appears in the installed themes list.
    Affected if PressMart theme is present in the themes directory
  2. Identify PressMart theme version
    In the WordPress admin under Appearance > Themes, click on the PressMart theme to view its details. Note the version number displayed, typically found in the theme header or description area.
    Affected if The displayed version is 1.2.26 or lower
  3. Verify version via theme files
    Access the theme directory via file manager or FTP (commonly at wp-content/themes/pressmart/style.css) and open the style.css file to read the Version: header comment.
    Affected if The Version header in style.css shows 1.2.26 or a lower number

If the PressMart theme is installed and its version is 1.2.26 or below, your environment is affected by this CVE.

Generated from the published advisory. Verify against your own configuration.

Check your environment

Paste your version and any relevant configuration and it will be compared against the affected criteria above. Do not include secrets or credentials.

AI-assisted, checked against the advisory. Informational, not a guarantee.

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 data
Mitigation available No clean upgrade yet — mitigate in the meantime
Mitigation

Upgrade PressMart to a version beyond 1.2.26 or apply vendor-supplied patches. If immediate patching is not possible, implement strict input validation and disable untrusted deserialization functions.

Have this fixed Scoped from the published advisory
  • Consultation4.0 h
  • Implementation8.0 h
  • Testing6.0 h
  • Review / QA3.0 h
21.0 hours of engineering $3,680
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References Go to the primary sourcePrimary sources — vendor advisories, patches and trackers. Where our summary and a reference disagree, the reference wins.

Primary sources

Practitioner notes

Contributed

Peer-ranked notes from engineers who’ve handled CVE-2026-39442 in production — separate from our analysis above.

No notes yet

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What this is

A place for practitioners to share what actually worked: a mitigation you’ve tested, a configuration change, a version- or environment-specific caveat, or a link to a verified patch. The most useful notes rise to the top as peers upvote them, so the signal stays high.

What belongs here
  • 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