CVE-2024-7434 – The UltraPress WordPress theme is vulnerable to... (How to Fix)

Q: What is the severity of CVE-2024-7434?

CVE-2024-7434 has a CVSS score of 8.8 (HIGH). The UltraPress WordPress theme is vulnerable to PHP object injection through deserialization of untrusted input. This allows authenticated attackers with Contributor-level access or higher to inject malicious PHP objects. If a POP chain exists via other installed plugins or themes, attackers could delete files, steal data, or execute arbitrary code.

📋 TL;DR

The UltraPress WordPress theme is vulnerable to PHP object injection through deserialization of untrusted input. This allows authenticated attackers with Contributor-level access or higher to inject malicious PHP objects. If a POP chain exists via other installed plugins or themes, attackers could delete files, steal data, or execute arbitrary code.

💻 Affected Systems

Products:

UltraPress WordPress Theme

Versions: All versions up to and including 1.2.1

Operating Systems: All operating systems running WordPress

Default Config Vulnerable: ⚠️ Yes

Notes: Requires Contributor-level WordPress user access or higher. Impact depends on presence of POP chains from other installed plugins/themes.

📦 What is this software?

Ultrapress by Ultrapress

View all CVEs affecting Ultrapress →

⚠️ Risk & Real-World Impact

🔴

Worst Case

Remote code execution leading to complete system compromise, data theft, or website defacement if a suitable POP chain exists in the environment.

🟠

Likely Case

Limited impact due to lack of known POP chain in UltraPress itself, but potential for data exposure or file deletion if vulnerable plugins/themes are present.

🟢

If Mitigated

Minimal impact with proper access controls, regular updates, and security plugins that block deserialization attacks.

🌐 Internet-Facing: HIGH

🏢 Internal Only: MEDIUM

🎯 Exploit Status

Public PoC: ✅ No

Weaponized: UNKNOWN

Unauthenticated Exploit: ✅ No

Complexity: MEDIUM

Exploitation requires authenticated access and depends on available POP chains in the environment.

🛠️ Fix & Mitigation

✅ Official Fix

Patch Version: Version after 1.2.1

Vendor Advisory: https://wordpress.org/themes/ultrapress/

Restart Required: No

Instructions:

1. Update UltraPress theme to latest version via WordPress admin panel. 2. Verify theme version is >1.2.1. 3. Clear any caching plugins/CDN caches.

🔧 Temporary Workarounds

Restrict User Roles

all

Limit Contributor and higher roles to trusted users only

Disable Theme

all

Switch to a different WordPress theme temporarily

🧯 If You Can't Patch

Implement strict access controls for Contributor and higher roles
Install security plugins that monitor for deserialization attacks

🔍 How to Verify

Check if Vulnerable:

Check WordPress admin panel > Appearance > Themes for UltraPress version ≤1.2.1

Check Version:

wp theme list --field=name,version --format=csv | grep ultrapress

Verify Fix Applied:

Confirm UltraPress theme version is >1.2.1 in WordPress admin

📡 Detection & Monitoring

Log Indicators:

Unusual PHP deserialization attempts in web server logs
Suspicious POST requests to theme files

Network Indicators:

HTTP requests containing serialized PHP objects in parameters

SIEM Query:

web_requests WHERE url CONTAINS 'ultrapress' AND (params CONTAINS 'O:' OR params CONTAINS 'a:')

📊 Metadata

CVE ID: CVE-2024-7434

CVSS v3 Score: 8.8 (HIGH)

CVSS Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

CWE: CWE-502

Published: October 1, 2024

Last Updated: November 13, 2024

🔗 References

https://wordpress.org/themes/ultrapress/ Product
https://www.wordfence.com/threat-intel/vulnerabilities/id/c9cf97a6-38bb-4499-98f0-ca2b7111f654?source=cve Third Party Advisory

📤 Share & Export

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🔗 Related Vulnerabilities

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