CVE-2022-45365

What it actually does

This vulnerability is a reflected cross-site scripting flaw in the Stock Ticker WordPress plugin through version 3.23.2. The plugin improperly includes attacker-controlled input in generated web pages without sufficient output encoding or sanitization. A remote unauthenticated attacker can craft a URL containing JavaScript or HTML that is reflected back to a visitor and executed in that visitor’s browser under the affected site’s origin. Because exploitation requires a victim to open the malicious link, the impact depends on the victim’s privileges and browser session state. Successful exploitation can allow session-context actions, theft of data accessible to page scripts, phishing overlays, content manipulation, or abuse of WordPress administrative capabilities if an authenticated administrator is targeted.

Why it matters to the business

If exploited, this flaw can undermine trust in a public website by allowing attackers to run malicious browser code through legitimate site pages. For organizations using the affected plugin, the risk is elevated because the exploit maturity is listed as weaponized and the EPSS score is high, indicating meaningful likelihood of exploitation activity. Business consequences may include account compromise, unauthorized website changes, credential or token theft, fraudulent redirects, brand damage, and increased incident response costs. While it is not listed in CISA KEV and is not known here as ransomware-associated, reflected XSS against WordPress sites is commonly used for credential harvesting, administrator session abuse, and staging follow-on attacks.

How an attack unfolds

An attacker first identifies a WordPress site running the Stock Ticker plugin at a vulnerable version through passive fingerprinting, plugin asset discovery, or probing for plugin paths. The attacker then crafts a URL that supplies malicious script content to an input the plugin reflects into a generated web page. Because the application fails to neutralize that input before rendering the response, the malicious JavaScript is included in the returned HTML. The attacker delivers the URL through email, chat, social media, comments, ads, or another lure. When a victim opens the link, the script executes in the victim’s browser as if it came from the legitimate website. If the victim is an authenticated user, especially a WordPress administrator or editor, the script may read page-accessible data, capture anti-CSRF nonces visible in the DOM, make same-origin requests, alter site settings or content, create malicious posts, inject persistent payloads where permissions allow, or redirect the user to a credential-harvesting page.

How to fix it

Upgrade the Stock Ticker plugin to a version that contains the vendor’s fix. The provided advisory data does not include an exact fixed version, so administrators should update to the latest available release from the official WordPress plugin repository or vendor source and verify that it is newer than 3.23.2. If no fixed release is available or the plugin is no longer maintained, disable and remove the plugin, then replace it with a maintained alternative. As compensating controls, restrict administrative access to trusted networks where feasible, deploy a web application firewall rule to block common reflected XSS payloads, enforce Content Security Policy to reduce script execution impact, and ensure WordPress, themes, and all other plugins are current. Developers maintaining forks or customizations should sanitize input, validate expected parameter formats, and apply context-appropriate output encoding for HTML, attributes, URLs, and JavaScript contexts.

How to confirm the fix worked

Confirm exposure by inventorying WordPress sites for the Stock Ticker plugin and checking the installed version. Any installation at version 3.23.2 or earlier should be considered vulnerable unless a vendor backport or compensating fix has been verified. Validate remediation by confirming the plugin has been upgraded to the latest fixed release or removed entirely, clearing caches/CDN layers, and retesting the previously vulnerable request pattern to ensure supplied HTML or JavaScript is encoded rather than executed. Security teams should also review HTTP response headers and application behavior to verify that Content Security Policy, HttpOnly/Secure cookie flags, and administrative access controls are in place where applicable. Avoid testing with destructive payloads in production; use benign markers such as encoded strings that would trigger a harmless alert only in controlled validation.

Typical attack path

1. Fingerprint the target website for WordPress and the Stock Ticker plugin, including plugin asset paths or exposed version metadata.
2. Confirm the installed plugin version is Stock Ticker 3.23.2 or earlier, or otherwise test whether crafted input is reflected unsafely.
3. Create a malicious URL containing an encoded JavaScript or HTML payload in the vulnerable reflected input.
4. Deliver the URL to a target user through phishing, messaging, social engineering, malicious ads, or another user-interaction channel.
5. Victim opens the URL while browsing the affected site.
6. The vulnerable plugin reflects the payload into the page response without proper encoding.
7. The payload executes in the victim’s browser in the security context of the affected website.
8. Attacker uses the victim’s session context to steal page-accessible data, perform unauthorized same-origin actions, phish credentials, redirect traffic, or prepare a more durable compromise.

How to detect it

To determine whether exploitation already occurred, review HTTP access logs from web servers, reverse proxies, CDNs, and WAFs for requests to WordPress pages or Stock Ticker plugin assets containing encoded HTML or JavaScript payloads. Focus on query strings with script tags, event-handler attributes, javascript: URLs, iframe injection, SVG-based payloads, or double-encoded equivalents. Correlate suspicious requests with authenticated WordPress sessions, especially administrator sessions, and then review WordPress audit logs for actions shortly after the request such as new user creation, role changes, plugin installation, theme/plugin file edits, post or widget modifications, option changes, redirect insertion, or unexpected external script references. Examine site content and filesystem paths for injected JavaScript, malicious redirects, or modified plugin/theme files. Browser-executed reflected XSS often leaves limited server-side evidence beyond the initial crafted request, so absence of post-exploitation artifacts does not fully rule out user-targeted exploitation.

• /wp-content/plugins/stock-ticker/
• stock-ticker
• %3Cscript
• <script
• %3C%2Fscript%3E
• </script>
• javascript%3A
• javascript:
• onerror%3D
• onload%3D
• onclick%3D
• %3Ciframe
• <iframe
• %3Csvg
• <svg
• alert%28document.domain%29
• document.cookie
• fetch%28
• XMLHttpRequest
• eval%28
• String.fromCharCode
• atob%28

What your security team should do

• Prioritize inventory and remediation for internet-facing WordPress sites using Stock Ticker, especially because exploit maturity is weaponized and the EPSS score is high.
• Upgrade Stock Ticker beyond 3.23.2 to the latest available release; if a fixed version cannot be confirmed, disable and remove the plugin.
• Search web access logs, WAF logs, CDN logs, and WordPress security logs for encoded script payloads or suspicious requests involving Stock Ticker plugin paths or parameters.
• Review recent administrator activity for unusual content edits, plugin/theme modifications, new users, new administrator accounts, unexpected redirects, or changes made shortly after suspicious requests.
• Invalidate active sessions and rotate credentials for privileged WordPress users if exploitation is suspected, especially administrators who may have clicked suspicious links.
• Deploy or tune WAF detections for reflected XSS payloads, including encoded angle brackets, script tags, event-handler attributes, and javascript: URLs.
• Harden browser-side and WordPress controls by enabling strong Content Security Policy where feasible, enforcing MFA for administrators, and limiting administrator access by role and network exposure.
• Monitor for follow-on compromise such as injected JavaScript in posts, widgets, theme files, plugin files, and unexpected external domains loaded by site pages.