# CVE-2026-78263 — Nexcess Event Tickets

> As of 2026-08-24, CVE-2026-78263 is a HIGH-severity vulnerability in Nexcess Event Tickets, CVSS v3.1 7.1, EPSS 0.1% (4.1th percentile). No Threadlinqs-tracked threat campaign has been attributed to CVE-2026-78263 as of 2026-08-24; the identifier is re-checked against the Threadlinqs threat corpus on every daily ingest.

**Last updated:** 2026-08-24

## What is CVE-2026-78263?

Unauthenticated Cross Site Scripting (XSS) in Event Tickets <= 5.29.2.1 versions.

The record classifies CVE-2026-78263 under weakness class [CWE-79](https://intel.threadlinqs.com/cwe/CWE-79). Its CVSS v3 base vector states that the flaw is reachable remotely over the network, needs no prior authentication, needs a user to take an action first. 1 affected-product entry is recorded, across 1 vendor, listed below. The identifier was first published 42 days ago.

## Severity and exploitation probability

- **CVSS v3.1 base score:** 7.1 — HIGH (`CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:L`)
- **EPSS (FIRST):** 0.1% probability of exploitation in the next 30 days, higher than 4.1% of all scored CVEs
- **CISA KEV:** Not listed in the CISA Known Exploited Vulnerabilities catalog
- **Threadlinqs priority:** 3.7/10 — a Threadlinqs composite of the CVSS base score, the EPSS percentile and public exploit availability
- **Published:** 2026-08-24

## Is CVE-2026-78263 being exploited?

It currently carries a trending score of 31 in the Threadlinqs vulnerability feed.

## Affected products and versions

- **Nexcess**: Event Tickets

## How to fix CVE-2026-78263

No vendor patch reference has been recorded for CVE-2026-78263 in the tracked sources. Follow the references below for a fix, and treat the products listed above as exposed until the vendor states otherwise.

## Threat activity tracking CVE-2026-78263

No threat campaign in the Threadlinqs corpus currently references CVE-2026-78263, in its CVE list or as an indicator. The linkage is recomputed from the live corpus on every daily ingest, so this section fills in as soon as a tracked campaign cites the identifier.

## Sources

Enriched from CVE.org, NVD, FIRST EPSS, GitHub Security Advisories. Last verified by Threadlinqs on 2026-08-25. This product uses the NVD API but is not endorsed or certified by the NVD.

**Vulnerability database entry**

- [patchstack.com — vdb entry](https://patchstack.com/database/wordpress/plugin/event-tickets/vulnerability/wordpress-event-tickets-plugin-5-29-2-1-cross-site-scripting-xss-vulnerability?_s_id=cve)

Canonical: https://intel.threadlinqs.com/cve/CVE-2026-78263
Full detection coverage and IOCs for threats exploiting CVE-2026-78263 via the Threadlinqs MCP server (Purple tier): https://intel.threadlinqs.com/mcp