CVE-2026-39573: CWE-502 Deserialization of Untrusted Data in Select-Themes Mildhill
CVE-2026-39573 is a high-severity vulnerability in Select-Themes Mildhill versions up to and including 1.5. It involves unauthenticated PHP object injection due to deserialization of untrusted data (CWE-502). This flaw allows an attacker to execute arbitrary code or cause denial of service without requiring authentication. No official patch or remediation guidance is currently available from the vendor.
AI Analysis
Technical Summary
This vulnerability (CVE-2026-39573) affects Select-Themes Mildhill versions <=1.5 and is classified as CWE-502: Deserialization of Untrusted Data. It allows unauthenticated attackers to perform PHP object injection, potentially leading to remote code execution or denial of service. The CVSS 3.1 base score is 8.1, reflecting high impact on confidentiality, integrity, and availability. No vendor advisory or patch information is provided, and no known exploits are reported in the wild as of the publication date.
Potential Impact
Successful exploitation can result in full compromise of the affected system, including arbitrary code execution and denial of service. The vulnerability does not require authentication, increasing its risk. The high CVSS score indicates critical impacts on confidentiality, integrity, and availability.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until an official fix is released, consider disabling or restricting access to vulnerable components if possible. Monitor official Select-Themes communications for updates.
CVE-2026-39573: CWE-502 Deserialization of Untrusted Data in Select-Themes Mildhill
Description
CVE-2026-39573 is a high-severity vulnerability in Select-Themes Mildhill versions up to and including 1.5. It involves unauthenticated PHP object injection due to deserialization of untrusted data (CWE-502). This flaw allows an attacker to execute arbitrary code or cause denial of service without requiring authentication. No official patch or remediation guidance is currently available from the vendor.
CVSS v3.1
Score 8.1high
Affected software
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
This vulnerability (CVE-2026-39573) affects Select-Themes Mildhill versions <=1.5 and is classified as CWE-502: Deserialization of Untrusted Data. It allows unauthenticated attackers to perform PHP object injection, potentially leading to remote code execution or denial of service. The CVSS 3.1 base score is 8.1, reflecting high impact on confidentiality, integrity, and availability. No vendor advisory or patch information is provided, and no known exploits are reported in the wild as of the publication date.
Potential Impact
Successful exploitation can result in full compromise of the affected system, including arbitrary code execution and denial of service. The vulnerability does not require authentication, increasing its risk. The high CVSS score indicates critical impacts on confidentiality, integrity, and availability.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until an official fix is released, consider disabling or restricting access to vulnerable components if possible. Monitor official Select-Themes communications for updates.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- Patchstack
- Date Reserved
- 2026-04-07T10:48:38.854Z
- Cvss Version
- 3.1
- State
- PUBLISHED
- Remediation Level
- null
Threat ID: 6a3280460b89be68882ff96e
Added to database: 06/17/2026, 11:08:54 UTC
Last enriched: 06/24/2026, 16:22:04 UTC
Last updated: 08/01/2026, 07:18:00 UTC
Views: 34
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