External risk intelligence

Readabler Plugin SQL Injection Vulnerability.

CVE advisorySeverity: CRITICAL (CVSS 9.3)

CVE-2026-74015

The vulnerability affects a WordPress plugin, which is a type of web application component commonly deployed in internet-facing web server environments. SQL injection flaws in such plugins are typically reachable by remote users over the public internet.

SQL Injection

Halo Surface Signal: 4 out of 5 — likely to be public-facing.

External exposure likelihood

Horizon Alert

Summary of the vulnerability and why it matters

A critical vulnerability has been identified in Readabler, a type of software component. This flaw allows unauthenticated attackers to potentially access or manipulate data through SQL injection, which could have significant implications for data integrity and availability if exploited. The main concern is to confirm if this specific software is in use and potentially exposed.

  • Unauthenticated code flaw in Readabler.
  • Potential for unauthorized data access and manipulation.
  • Confirm relevance and exposure of the affected software.

Attack Path

How an attacker could exploit the issue

An unauthenticated attacker could exploit a vulnerability in Readabler to inject malicious SQL code into a web application. This could occur if the application is running an unpatched version of Readabler and is accessible from the internet. Successful exploitation might allow an attacker to access or manipulate sensitive data within the application's database.

  • No authentication needed.
  • User-supplied input in Readabler.
  • Potential for data compromise.

Live Threat

Current exploitation, exposure, and threat context

This vulnerability could allow an unauthenticated attacker to inject malicious SQL code into the application. When an attacker successfully exploits this vulnerability, they could potentially read sensitive data from the application's database. The advisory does not specify what type of data or PII could be exposed.

  • Database information.
  • Unauthenticated network requests.
  • Unauthorized data access.

Operational Fix

Recommended remediation, mitigation, and detection steps

Unauthenticated SQL injection in Readabler versions prior to 2.0.18 requires immediate attention from teams managing internet-facing web applications. The first step is to inventory all instances of Readabler, assess their exposure and business criticality, identify the accountable application or platform owner, and then prioritize remediation efforts based on risk.

  • Application or Platform owners.
  • Verify Readabler instances and exposure.
  • Plan remediation based on risk.

Supplementary metadata

Validate whether this threat affects your internet-facing exposure.

Halo Threat Intelligence helps prioritize remediation with Halo Surface Signal and H/A/L/O context. Start exposure validation with a free external attack surface trial.

Frequently asked questions

What is the Readabler plugin?

Readabler is a software component designed as a WordPress plugin. Plugins like this are commonly installed to enhance website functionality, specifically for managing accessibility features or text readability adjustments for site visitors.

What does SQL injection mean for CVE-2026-74015?

This vulnerability is classified as CWE-89 (Improper Neutralization of Special Elements used in an SQL Command). It means the plugin fails to properly sanitize user input, allowing an attacker to insert their own database commands. By tricking the application, unauthorized actors could potentially read sensitive information stored in the database.

How does an attacker trigger this vulnerability?

An attacker triggers this by sending specially crafted, unauthenticated network requests to the affected website. Because the plugin does not require a login, no prior account access or administrative privileges are needed to attempt the injection. Simply visiting the site or interacting with vulnerable components is enough for an attacker to send these malicious inputs.

Is my instance of Readabler at risk?

According to Halo Surface Signal, this vulnerability is likely to affect internet-facing web servers. Since Readabler is a web component, instances exposed to the public internet are directly reachable by remote users. If your installation is hidden behind a secure, internal network, the potential for external exploitation is reduced compared to public-facing sites.

How do I respond to this vulnerability?

First, conduct an inventory of your environment to identify any instances of Readabler running versions older than 2.0.18. Once identified, evaluate the criticality of the applications hosting these versions. Prioritize updating these components to version 2.0.18 or higher to resolve the underlying flaw.

References