Simple URLs <= 117 - Reflected Cross-Site Scripting via 'post_id'
Strategic Overview
- Status
- Patched in 118
- Affected Plugin
- Lasso Lite – Affiliate Link Manager & Product Displays
- Affected Version
<= 117- CVSS
- 6.1Medium
- Weakness type
- CWE-79 · Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
- CVE
CVE-2023-40667
At a glance
CVE-2023-40667 is a medium-severity Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') vulnerability in the Lasso Lite WordPress plugin, affecting versions <= 117. It carries a CVSS score of 6.1 (reachable over the network; low attack complexity). Exploitation requires no authentication. The issue is fixed in version 118; sites on affected versions should update now. Disclosed August 2023, reported by Rafshanzani Suhada.
Vulnerability Overview
The Simple URLs plugin for WordPress is vulnerable to Reflected Cross-Site Scripting via the 'post_id' parameter in versions up to, and including, 117 due to insufficient input sanitization and output escaping. This makes it possible for unauthenticated attackers to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page.
Technical Analysis
The vector marks this flaw as remotely reachable over the network, with low attack complexity — no special timing or configuration is needed, and no privileges on the target site.
CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
Lasso Lite <= 117 carries this weakness at post_id, and reaching it takes a caller who can reach the endpoint. Cross-site scripting happens when input from a request is written into a page without being escaped for the context it lands in, so the browser parses attacker-supplied text as markup or script.
Injected script runs with the privileges of whoever views the affected page, which is how these flaws turn into administrator session theft, silent account creation or persistent backdoors in page content. For Lasso Lite the fix is 118: builds <= 117 are affected, anything from 118 onward is not.
Remediation
Update to version 118, or a newer patched version
How does WordSec protect against this?
The attempt arrives as an ordinary request to Lasso Lite: WordSec's web application firewall inspects request payloads before WordPress loads them. None of that substitutes for the fix: Lasso Lite 118 closes this, and updating the plugin is the step that ends it.
- Firewall
- Alerts
External References
Related records
Same weakness class
Other vulnerabilities in Lasso Lite – Affiliate Link Manager & Product Displays
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