Is CVE-2026-11982 exploited in the wild?

No. Junglewise Threat Intelligence has no report of CVE-2026-11982 being exploited in the wild.

How severe is CVE-2026-11982?

Informational severity, with a CVSS score of 5.1, published 18 June 2026.

Which products and versions are affected?

Grav Admin Panel Plugin 2.0.0-rc.14; Grav API Plugin 1.7.52.

Is there a fix for CVE-2026-11982?

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-2026-11982 attacked?

It is attacked over the network, in a web application.

Am I affected by CVE-2026-11982?

Check whether you run Grav Admin Panel Plugin or Grav API Plugin at an affected version. 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-2026-11982: Grav CMS stored XSS in Admin2 Pages API

CVE-2026-11982 · Severity: info · CVSS 5.1 · Published 2026-06-18

Grav CMS, a popular flat-file content management system, contains a security vulnerability in its Admin2 Pages API. An attacker with low-level editing privileges can save malicious scripts into website pages. When other users or administrators view these pages, the scripts can execute in their browsers, potentially leading to unauthorized actions or data theft.

Technologies: Grav API Plugin. Vendors: Grav.

Quick answers

Is CVE-2026-11982 exploited in the wild?: No. Junglewise Threat Intelligence has no report of CVE-2026-11982 being exploited in the wild.
How severe is CVE-2026-11982?: Informational severity, with a CVSS score of 5.1, published 18 June 2026.
Which products and versions are affected?: Grav Admin Panel Plugin 2.0.0-rc.14; Grav API Plugin 1.7.52.
Is there a fix for CVE-2026-11982?: 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-2026-11982 attacked?: It is attacked over the network, in a web application.
Am I affected by CVE-2026-11982?: Check whether you run Grav Admin Panel Plugin or Grav API Plugin at an affected version. 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 Grav 2.0.0-rc.9 with Admin2 2.0.0-rc.14. The root cause is located in the `validateChangedFields()` function within the Admin2/API partial page save path (specifically the PATCH /pages endpoint). While the system performed standard validation, it failed to execute `Validation::checkSafety()`, allowing `Security::detectXss()` to be bypassed. A non-superadmin editor can persist malicious event-handler payloads (e.g., img tags with onerror attributes) in page Markdown. These payloads execute when rendered on the frontend for any viewer, including administrators. A fix has been committed to the grav-plugin-api repository to enforce XSS safety checks during partial-field validation.

Affected products

Grav grav-plugin-api 1.7.52
Grav Grav CMS 2.0.0-rc.9
Grav Admin2 plugin 2.0.0-rc.14

Timeline

2026-06-18: disclosed
2026-06-18: advisory

References

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