CVE-2026-35569
8.7 · HIGHOverview
CVE-2026-35569 is a high-severity vulnerability affecting apostrophecms apostrophecms. It was published on April 15, 2026 and has a CVSS 3.1 base score of 8.7 (HIGH).
This vulnerability has a CVSS 3.1 base score of 8.7, rated HIGH. It can be exploited remotely over the network. Some level of privileges is required for exploitation.
Technical Description
ApostropheCMS is an open-source Node.js content management system. Versions 4.28.0 and prior contain a stored cross-site scripting vulnerability in SEO-related fields (SEO Title and Meta Description), where user-controlled input is rendered without proper output encoding into HTML contexts including <title> tags, <meta> attributes, and JSON-LD structured data. An attacker can inject a payload such as "></title><script>alert(1)</script> to break out of the intended HTML context and execute arbitrary JavaScript in the browser of any authenticated user who views the affected page. This can be leveraged to perform authenticated API requests, access sensitive data such as usernames, email addresses, and roles via internal APIs, and exfiltrate it to an attacker-controlled server. This issue has been fixed in version 4.29.0.
Remediation
Check the references section for vendor advisories and patches from apostrophecms. Update apostrophecms to the latest patched version. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.
Affected Products
| Vendor | Product | Versions | Status |
|---|---|---|---|
| apostrophecms | apostrophecms | >= 0, < 4.29.0 | Affected |
Frequently Asked Questions
What is CVE-2026-35569?
CVE-2026-35569 is a high-severity vulnerability affecting apostrophecms apostrophecms. It was published on April 15, 2026 and has a CVSS 3.1 base score of 8.7 (HIGH).
How severe is CVE-2026-35569?
This vulnerability has a CVSS 3.1 base score of 8.7, rated HIGH. It can be exploited remotely over the network. Some level of privileges is required for exploitation.
How do I fix or remediate CVE-2026-35569?
Check the references section for vendor advisories and patches from apostrophecms. Update apostrophecms to the latest patched version. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.
How can CyberStrike help with CVE-2026-35569?
CyberStrike's AI-powered security agents can automatically detect CVE-2026-35569 across your infrastructure using autonomous pentesting, DAST scanning, and HackBrowser. The platform continuously monitors for known vulnerabilities and provides actionable remediation guidance prioritized by real-world exploitability.
How CyberStrike Helps
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