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CVE-2026-66437 Themeisle CVE debrief

CVE-2026-66437 is a Server Side Request Forgery (SSRF) vulnerability affecting Feedzy RSS Feeds versions up to 5.2.4. This issue allows contributors to make the server perform unintended requests, potentially bypassing access controls and interacting with internal or external services. The vulnerability has a CVSS score of 4.9, indicating a medium severity level. Users of Feedzy RSS Feeds plugin version 5.2.4 or earlier should apply updates to mitigate this vulnerability. The CVE record was published on 2026-07-27T15:17:11.190Z and last modified on 2026-07-27T17:46:02.447Z.

Vendor
Themeisle
Product
Feedzy
CVSS
MEDIUM 4.9
CISA KEV
Not listed in stored evidence
Original CVE published
2026-07-27
Original CVE updated
2026-07-27
Advisory published
2026-07-27
Advisory updated
2026-07-27

Who should care

Users of Feedzy RSS Feeds plugin version 5.2.4 or earlier should apply updates to mitigate this vulnerability. Additionally, administrators and security teams responsible for managing and securing their WordPress installations should be aware of this vulnerability and take necessary actions to protect their systems. This includes reviewing server logs for unusual request patterns and restricting contributor privileges to minimize the attack surface.

Technical summary

CVE-2026-66437 is a Server Side Request Forgery (SSRF) vulnerability in the Feedzy RSS Feeds plugin up to version 5.2.4. The vulnerability allows authenticated contributors to make the server perform requests to other resources, potentially bypassing access controls and interacting with internal or external services. This could lead to unintended actions, data breaches, or further exploitation. The CVSS score of 4.9 indicates a medium severity level, emphasizing the need for prompt mitigation.

Defensive priority

Medium priority due to the CVSS score of 4.9 and the potential for SSRF attacks.

Recommended defensive actions

  • Apply the latest patch or update Feedzy RSS Feeds to a version beyond 5.2.4.
  • Restrict contributor privileges to minimize the attack surface.
  • Monitor server logs for unusual request patterns.
  • Review compensating controls for exposed systems while remediation is scheduled and verified.
  • Check relevant monitoring, detection, and logs for exposed assets that need extra review.

Evidence notes

Evidence from Patchstack indicates a Server Side Request Forgery (SSRF) vulnerability in Feedzy RSS Feeds plugin version 5.2.4 and earlier. The CVE record was published on 2026-07-27T15:17:11.190Z and last modified on 2026-07-27T17:46:02.447Z. The vulnerability allows authenticated contributors to make the server perform requests to other resources, potentially bypassing access controls and interacting with internal or external services. However, the exact scope of affected systems and potential impact is limited by the availability of detailed information.

Sources and references

Verified primary and authoritative sources

  • CVE-2026-66437 CVE Program record

    Publisher, destination, and source semantics verified

    URL: https://www.cve.org/CVERecord?id=CVE-2026-66437

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

  • CVE-2026-66437 NVD vulnerability detail

    Publisher, destination, and source semantics verified

    URL: https://nvd.nist.gov/vuln/detail/CVE-2026-66437

    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.