Answer in brief
CVE-2026-19801 records a Medium severity (CVSS 4.3) vulnerability in BetterLinks <= 3.1.0 - Missing Authorization to Authenticated (Subscriber+) Arbitrary Short URL Creation via create_fbs_link AJAX Action. The current sources do not mark it as known exploited. The current feed maps wpdevteam/BetterLinks – Link Shortener, Link Cloaking, Redirects, Affiliate Link Manager & MCP (generic), wpdevteam/BetterLinks – Link Shortener, Link Cloaking, Redirects, Affiliate Link Manager & MCP (generic). Check affected ranges and fixed versions before updating.
Analysis pending evidence review
HOL Guard separates source facts from reviewed analysis. See the methodology.
CVSS is 4.3. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.
Analysis status
Analysis pending evidence review
Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.
The current feed maps wpdevteam/BetterLinks – Link Shortener, Link Cloaking, Redirects, Affiliate Link Manager & MCP (generic), wpdevteam/BetterLinks – Link Shortener, Link Cloaking, Redirects, Affiliate Link Manager & MCP (generic). Check affected ranges and fixed versions before updating.
| Package | Affected range | Fixed version |
|---|---|---|
| wpdevteam/BetterLinks – Link Shortener, Link Cloaking, Redirects, Affiliate Link Manager & MCPgeneric | >=0 <=3.1.0 | Not reported |
| wpdevteam/BetterLinks – Link Shortener, Link Cloaking, Redirects, Affiliate Link Manager & MCPgeneric | 0 | Not reported |
Published upstream
Aug 25, 2026
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Aug 26, 2026
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
Aug 25, 2026
The BetterLinks – Link Shortener, Link Cloaking, Redirects, Affiliate Link Manager & MCP plugin for WordPress is vulnerable to authorization bypass in all versions up to, and including, 3.1.0. This is due to the plugin not properly verifying that a user is authorized to perform an action. This makes it possible for authenticated attackers, with subscriber-level access and above, to create arbitrary BetterLinks short URLs with attacker-controlled slugs and redirect destinations, enabling phishing and SEO abuse. Exploitation requires the Fluent Boards companion plugin to be installed and active (so that the FLUENT_BOARDS constant is defined), and is further facilitated by the betterlinks_admin_nonce nonce being emitted on every frontend page via wp_localize_script, making it accessible to any authenticated user.
Quoted source text, attributed separately from HOL analysis.