Image Source Control Lite – Show Image Credits and Captions <= 3.9.1 - Authenticated (Author+) Stored Cross-Site Scripting via 'Image Source' Field
Strategic Overview
- Status
- Patched in 3.9.2
- Affected Plugin
- Image Source Control Lite – Show Image Credits and Captions
- Affected Version
<= 3.9.1- CVSS
- 6.4Medium
- Weakness type
- CWE-79 · Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
- CVE
CVE-2026-4852
At a glance
CVE-2026-4852 is a medium-severity Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') vulnerability in the Image Source Control Lite WordPress plugin, affecting versions <= 3.9.1. It carries a CVSS score of 6.4 (reachable over the network; low attack complexity). Exploitation requires an authenticated account at Author level or above. The issue is fixed in version 3.9.2; sites on affected versions should update now. Disclosed April 2026, reported by Athiwat Tiprasaharn (Jitlada).
Vulnerability Overview
The Image Source Control Lite – Show Image Credits and Captions plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the 'Image Source' attachment field in all versions up to, and including, 3.9.1 due to insufficient input sanitization and output escaping. This makes it possible for authenticated attackers, with Author-level access and above, 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 interaction from a victim user.
CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
Reaching this weakness in Image Source Control Lite <= 3.9.1 takes an account at Author level or above. 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 Image Source Control Lite the fix is 3.9.2: builds <= 3.9.1 are affected, anything from 3.9.2 onward is not.
Remediation
Update to version 3.9.2, or a newer patched version
How does WordSec protect against this?
An attacker needs Author access first, so the firewall sees the attempt as traffic from a logged-in account: WordSec's web application firewall inspects request payloads before WordPress loads them. None of that substitutes for the fix: Image Source Control Lite 3.9.2 closes this, and updating the plugin is the step that ends it.
- Firewall
- Alerts
External References
Related records
Same weakness class
Other vulnerabilities in Image Source Control Lite – Show Image Credits and Captions
Vulnerability data © Defiant, Inc., provided under the Wordfence Intelligence T&C