# CVE-2026-66602 — DevItems HashBar – WordPress Notification Bar

> As of 2026-08-19, CVE-2026-66602 is a HIGH-severity vulnerability in DevItems HashBar – WordPress Notification Bar, CVSS v3.1 8.8, EPSS 0.1% (4.3th percentile). No Threadlinqs-tracked threat campaign has been attributed to CVE-2026-66602 as of 2026-08-19; the identifier is re-checked against the Threadlinqs threat corpus on every daily ingest.

**Last updated:** 2026-08-19

## What is CVE-2026-66602?

Cross-Site Request Forgery (CSRF) vulnerability in DevItems HashBar – WordPress Notification Bar allows Cross Site Request Forgery. This issue affects HashBar – WordPress Notification Bar: from n/a through 2.0.0.

The record classifies CVE-2026-66602 under weakness class [CWE-352](https://intel.threadlinqs.com/cwe/CWE-352). 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, and has high impact on confidentiality, integrity, availability. 1 affected-product entry is recorded, across 1 vendor, listed below. The identifier was first published 48 days ago.

## Severity and exploitation probability

- **CVSS v3.1 base score:** 8.8 — HIGH (`CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H`)
- **EPSS (FIRST):** 0.1% probability of exploitation in the next 30 days, higher than 4.3% of all scored CVEs
- **CISA KEV:** Not listed in the CISA Known Exploited Vulnerabilities catalog
- **Threadlinqs priority:** 4.6/10 — a Threadlinqs composite of the CVSS base score, the EPSS percentile and public exploit availability
- **Published:** 2026-08-18, last modified 2026-08-19

## Is CVE-2026-66602 being exploited?

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

## Affected products and versions

- **DevItems**: HashBar – WordPress Notification Bar

## How to fix CVE-2026-66602

No vendor patch reference has been recorded for CVE-2026-66602 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-2026-66602

No threat campaign in the Threadlinqs corpus currently references CVE-2026-66602, 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, GitHub Security Advisories, FIRST EPSS. Last verified by Threadlinqs on 2026-08-19.

**Vulnerability database entry**

- [patchstack.com — vdb entry](https://patchstack.com/database/wordpress/plugin/hashbar-wp-notification-bar/vulnerability/wordpress-hashbar-wordpress-notification-bar-plugin-2-0-0-cross-site-request-forgery-csrf-vulnerability?_s_id=cve)

Canonical: https://intel.threadlinqs.com/cve/CVE-2026-66602
Full detection coverage and IOCs for threats exploiting CVE-2026-66602 via the Threadlinqs MCP server (Purple tier): https://intel.threadlinqs.com/mcp