Apostrophecms

A stored cross-site scripting vulnerability (CVE-2026-45011) was identified in ApostropheCMS image widget functionality, where a user with the Editor role can configure an image widget link to use a javascript: URL payload, which will execute arbitrary JavaScript in the victim’s browser when clicked.

ApostropheCMS is vulnerable to authenticated server-side request forgery (SSRF) via rich-text widget import; an attacker with edit access can trigger server-side requests to attacker-controlled URLs during widget validation, enabling internal port scanning and potential data exfiltration by re-hosting image-compatible responses.

A stored cross-site scripting (XSS) vulnerability exists in SEO-related fields (SEO Title and Meta Description) in ApostropheCMS v4.28.0, allowing injection of arbitrary JavaScript into HTML contexts, performing authenticated API requests, and exfiltrating sensitive data, leading to a compromise of application confidentiality.

A stored XSS vulnerability in ApostropheCMS versions 4.28.0 and prior allows attackers to inject arbitrary JavaScript into SEO-related fields, leading to potential data exfiltration and unauthorized actions.