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PatchSiren cyber security CVE debrief

CVE-2026-49113 THEMECO CVE debrief

CVE-2026-49113 is a HIGH severity vulnerability (CVSS Score: 8.5) in the Cornerstone plugin, affecting versions prior to 7.8.8. This issue allows subscribers to execute arbitrary code. The vulnerability was published on June 17, 2026, and last modified on the same day. Users of the Cornerstone plugin should update to version 7.8.8 or later to mitigate this risk. This vulnerability is particularly concerning as it allows low-privileged users to execute code, potentially leading to significant system compromise. The CVE record and details can be found on official CVE and NVD websites.

Vendor
THEMECO
Product
Cornerstone
CVSS
HIGH 8.5
CISA KEV
Not listed in stored evidence
Original CVE published
2026-06-17
Original CVE updated
2026-06-17
Advisory published
2026-06-17
Advisory updated
2026-06-17

Who should care

Administrators and users of the Cornerstone plugin, especially those with subscriber-level access, should be aware of this vulnerability. Updating to version 7.8.8 or later is crucial to prevent potential code execution by low-privileged users.

Technical summary

The CVE-2026-49113 vulnerability in the Cornerstone plugin (versions < 7.8.8) allows subscribers to execute arbitrary code. This HIGH severity issue has a CVSS Score of 8.5. The vulnerability's CVSS vector is CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:H, indicating a complex attack scenario (AC:H) requiring low privileges (PR:L) that can lead to high impacts on confidentiality (C:H), integrity (I:H), and availability (A:H).

Defensive priority

High

Recommended defensive actions

  • Update Cornerstone plugin to version 7.8.8 or later.
  • Restrict subscriber privileges to minimize potential damage.
  • Monitor Cornerstone plugin usage for suspicious activity.
  • Implement a Web Application Firewall (WAF) to detect and prevent code execution attempts.
  • Regularly review and update plugins and themes to prevent vulnerabilities.
  • Consider implementing additional security measures such as two-factor authentication and regular backups.

Evidence notes

The information provided is based on data from official sources, including CVE.org and NVD. The CVE record was published and modified on June 17, 2026. Additional details can be found through the provided resource links.

Sources and references

Verified primary and authoritative sources

  • CVE-2026-49113 CVE Program record

    Publisher, destination, and source semantics verified

    URL: https://www.cve.org/CVERecord?id=CVE-2026-49113

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

  • CVE-2026-49113 NVD vulnerability detail

    Publisher, destination, and source semantics verified

    URL: https://nvd.nist.gov/vuln/detail/CVE-2026-49113

    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.