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PatchSiren cyber security CVE debrief

CVE-2026-39498 Yeeaddons CVE debrief

CVE-2026-39498 is a HIGH-severity vulnerability in the YayMail plugin, affecting versions up to 4.3.3. This vulnerability allows for PHP Object Injection, potentially enabling attackers to execute arbitrary code on the affected system. The vulnerability has a CVSS score of 7.2 and requires high privileges to exploit.

Vendor
Yeeaddons
Product
YayMail
CVSS
HIGH 7.2
CISA KEV
Not listed in stored evidence
Original CVE published
2026-06-15
Original CVE updated
2026-06-15
Advisory published
2026-06-15
Advisory updated
2026-06-15

Who should care

Users of the YayMail plugin, particularly those with shop manager roles, should be aware of this vulnerability and take steps to mitigate it.

Technical summary

The CVE-2026-39498 vulnerability is caused by a PHP Object Injection issue in the YayMail plugin. This occurs when an attacker can inject malicious PHP objects into the application, potentially leading to code execution. The vulnerability has been assigned a CVSS score of 7.2, indicating a HIGH severity level.

Defensive priority

HIGH

Recommended defensive actions

  • Update the YayMail plugin to a version that addresses this vulnerability.
  • Restrict access to the shop manager role to trusted users only.
  • Monitor the system for suspicious activity.

Evidence notes

Evidence for this CVE comes from Patchstack, as indicated by the reference [ref-4].

Sources and references

Verified primary and authoritative sources

  • CVE-2026-39498 CVE Program record

    Publisher, destination, and source semantics verified

    URL: https://www.cve.org/CVERecord?id=CVE-2026-39498

    CVE Program - Official CVE Program record with source-provided CVE metadata.

  • CVE-2026-39498 NVD vulnerability detail

    Publisher, destination, and source semantics verified

    URL: https://nvd.nist.gov/vuln/detail/CVE-2026-39498

    NIST National Vulnerability Database - Official NIST NVD detail page and source-specific vulnerability assessment.

Methodology and review provenance

AI-assisted synthesis based on stored public vulnerability evidence. System validation, approval state, and publication status do not by themselves establish human review of this revision. PatchSiren helps prioritize defensive review and does not prove exposure or remediation on any system.