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PatchSiren cyber security CVE debrief

CVE-2026-48838 WPExperts CVE debrief

CVE-2026-48838 is a high-severity Unauthenticated Cross Site Scripting (XSS) vulnerability in the Post SMTP plugin versions <= 3.6.2. The vulnerability has a CVSS score of 7.1 and was published on [cvePublishedAt](https://www.cve.org/CVERecord?id=CVE-2026-48838).

Vendor
WPExperts
Product
Post SMTP
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 Post SMTP plugin versions <= 3.6.2 should be aware of this vulnerability and take necessary actions to mitigate it.

Technical summary

The vulnerability is caused by an unauthenticated Cross Site Scripting (XSS) issue in the Post SMTP plugin. The CVSS vector for this vulnerability is CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:L.

Defensive priority

high

Recommended defensive actions

  • Update Post SMTP plugin to a version greater than 3.6.2.
  • Refer to [ref-4](https://patchstack.com/database/wordpress/plugin/post-smtp/vulnerability/wordpress-post-smtp-plugin-3-6-2-cross-site-scripting-xss-vulnerability?_s_id=cve) for mitigation or vendor reference.

Evidence notes

The vulnerability was reported by [email protected] and has a CWE-79 weakness.

Sources and references

Verified primary and authoritative sources

  • CVE-2026-48838 CVE Program record

    Publisher, destination, and source semantics verified

    URL: https://www.cve.org/CVERecord?id=CVE-2026-48838

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

  • CVE-2026-48838 NVD vulnerability detail

    Publisher, destination, and source semantics verified

    URL: https://nvd.nist.gov/vuln/detail/CVE-2026-48838

    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.