Apostrophe has stored XSS via javascript: URL in Image Widget Link
CVE-2026-45011

7.3HIGH

Key Information:

Vendor

Apostrophecms

Status
Apostrophe
Vendor
CVE Published:
12 June 2026

What is CVE-2026-45011?

ApostropheCMS is an open-source Node.js content management system. Version 4.29.0 has a stored cross-site scripting vulnerability in the image widget functionality. A user with the Editor role can configure an image widget link to use a javascript: URL payload. Because editors have permission to publish pages, the malicious widget can be published to the live site. When another user, including an administrator or public visitor, clicks the affected image/link, arbitrary JavaScript executes in the victim’s browser. As of time of publication, no known patched versions are available.

Affected Version(s)

apostrophe = 4.29.0

References

https://github.com/apostrophecms/apostrophe/security/advi...
x_refsource_CONFIRM
https://github.com/apostrophecms/apostrophe/releases/tag/...
x_refsource_MISC

CVSS V3.1

Score:
7.3
Severity:
HIGH
Confidentiality:
High
Integrity:
High
Availability:
High
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
Low
User Interaction:
Required
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

.