PatchSiren

PatchSiren cyber security CVE debrief

CVE-2026-78263 Nexcess CVE debrief

CVE-2026-78263 is a high-severity unauthenticated Cross Site Scripting (XSS) vulnerability in Event Tickets plugin versions up to 5.29.2.1. The CVE record was published on 2026-08-24T22:17:20.133Z and was last modified on 2026-10-12T15:10:00.207Z. The NVD entry is currently Deferred.

Vendor
Nexcess
Product
Event Tickets
CVSS
HIGH 7.1
CISA KEV
Not listed in stored evidence
Original CVE published
2026-08-24
Original CVE updated
2026-10-12
Advisory published
2026-08-24
Advisory updated
2026-10-12

Who should care

Defenders responsible for WordPress installations with the Event Tickets plugin should assess exposure and prioritize patching or mitigation

Why it matters

CVE-2026-78263 is a high-severity unauthenticated Cross Site Scripting (XSS) vulnerability in Event Tickets plugin versions up to 5.29.2.1. Defenders responsible for WordPress installations with the Event Tickets plugin should assess exposure and prioritize patching or mitigation.

  • Defenders should verify exposure and apply patches or mitigations to prevent potential exploitation
  • Successful exploitation could lead to Cross Site Scripting (XSS) attacks
  • Defenders should monitor for potential exploitation attempts

Technical summary

CVE-2026-78263 is a high-severity unauthenticated Cross Site Scripting (XSS) vulnerability in Event Tickets plugin versions up to 5.29.2.1. The vulnerability has a CVSS score of 7.1 and is classified as HIGH.

Defensive priority

Defenders should prioritize verifying exposure and applying patches or mitigations.

Recommended defensive actions

  • Verify exposure by checking if the Event Tickets plugin version is 5.29.2.1 or earlier
  • Apply patches or mitigations provided by the vendor
  • Monitor for potential exploitation attempts

Evidence notes

The CVE record and NVD detail page provide official information about the vulnerability.

Sources and references

Verified primary and authoritative sources

  • CVE-2026-78263 CVE Program record

    Publisher, destination, and source semantics verified

    URL: https://www.cve.org/CVERecord?id=CVE-2026-78263

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

  • CVE-2026-78263 NVD vulnerability detail

    Publisher, destination, and source semantics verified

    URL: https://nvd.nist.gov/vuln/detail/CVE-2026-78263

    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.