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PatchSiren cyber security CVE debrief

CVE-2026-40770 RelyWP CVE debrief

CVE-2026-40770 is a HIGH severity Unauthenticated Cross Site Scripting (XSS) vulnerability in Coupon Affiliates plugin versions <= 7.5.3. The vulnerability has a CVSS score of 7.1 and was published on [cvePublishedAt](https://www.cve.org/CVERecord?id=CVE-2026-40770).

Vendor
RelyWP
Product
Coupon Affiliates
CVSS
HIGH 7.1
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 Coupon Affiliates plugin versions <= 7.5.3 should apply patches or mitigations to prevent exploitation.

Technical summary

The vulnerability is caused by a lack of proper input validation and sanitization in the Coupon Affiliates plugin, allowing an unauthenticated attacker to inject malicious JavaScript code.

Defensive priority

HIGH

Recommended defensive actions

  • Apply patches or updates to Coupon Affiliates plugin versions <= 7.5.3.
  • Implement additional security measures such as input validation and sanitization.

Evidence notes

Evidence of this vulnerability was provided by Patchstack.

Sources and references

Verified primary and authoritative sources

  • CVE-2026-40770 CVE Program record

    Publisher, destination, and source semantics verified

    URL: https://www.cve.org/CVERecord?id=CVE-2026-40770

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

  • CVE-2026-40770 NVD vulnerability detail

    Publisher, destination, and source semantics verified

    URL: https://nvd.nist.gov/vuln/detail/CVE-2026-40770

    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.