Is CVE-2026-45014 exploited in the wild?

No. Junglewise Threat Intelligence has no report of CVE-2026-45014 being exploited in the wild.

How severe is CVE-2026-45014?

Informational severity, with a CVSS score of 5.3, published 12 June 2026.

Which products and versions are affected?

Apostrophe Technologies ApostropheCMS <= 4.29.0.

Is there a fix for CVE-2026-45014?

No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.

How is CVE-2026-45014 attacked?

It is attacked over the network, in a network appliance.

Am I affected by CVE-2026-45014?

Check whether anything you run is named in the advisory. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

CVE-2026-45014: ApostropheCMS stored XSS in draft version tooltip

Q: Is there a fix for CVE-2026-45014?

No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.

Q: How is CVE-2026-45014 attacked?

It is attacked over the network, in a network appliance.

Q: Am I affected by CVE-2026-45014?

Check whether anything you run is named in the advisory. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

CVE-2026-45014 · Severity: info · CVSS 5.3 · Published 2026-06-12

ApostropheCMS, a platform used for building and managing websites, contains a security flaw that allows malicious scripts to be saved and executed in the administrative interface. An attacker could use this to target website administrators, potentially leading to unauthorized actions or data theft when the administrator views specific tooltips. At the time of reporting, no official patch has been released.

Quick answers

Is CVE-2026-45014 exploited in the wild?: No. Junglewise Threat Intelligence has no report of CVE-2026-45014 being exploited in the wild.
How severe is CVE-2026-45014?: Informational severity, with a CVSS score of 5.3, published 12 June 2026.
Which products and versions are affected?: Apostrophe Technologies ApostropheCMS <= 4.29.0.
Is there a fix for CVE-2026-45014?: No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.
How is CVE-2026-45014 attacked?: It is attacked over the network, in a network appliance.
Am I affected by CVE-2026-45014?: Check whether anything you run is named in the advisory. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

Technical details

A stored cross-site scripting (XSS) vulnerability exists in ApostropheCMS versions up to and including 4.29.0. The root cause is the failure to sanitize user display names before rendering them within the tooltip of the draft versioning system. An attacker can inject malicious JavaScript into their display name; this script is then executed in the context of any user (typically an editor or admin) who views the affected tooltip. This is a network-based attack requiring user interaction. As of the advisory publication, no patched version is available.

Affected products

Apostrophe Technologies ApostropheCMS <= 4.29.0

Timeline

2026-05-13: advisory: Initial GitHub security advisory published
2026-06-12: disclosed: CVE published to NVD

References

https://github.com/apostrophecms/apostrophe/security/advisories/GHSA-hvx2-4ghc-j37m

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