Is CVE-2026-12900 exploited in the wild?

No. Junglewise Threat Intelligence has no report of CVE-2026-12900 being exploited in the wild.

How severe is CVE-2026-12900?

Medium severity, with a CVSS score of 6.4, published 20 July 2026.

Which products and versions are affected?

Brainstorm Force Spectra up to, and including, 2.19.28.

Is there a fix for CVE-2026-12900?

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-2026-12900 attacked?

It is attacked over the network, in a software library.

Am I affected by CVE-2026-12900?

Check whether you run Brainstorm Force Spectra 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-2026-12900: Brainstorm Force Spectra Stored XSS in uagb/image block

CVE-2026-12900 · Severity: medium · CVSS 6.4 · Published 2026-07-20

Spectra is a popular WordPress plugin used to enhance the website building experience with custom blocks. A security flaw in the plugin's image block allows users with contributor-level access or higher to embed malicious scripts into pages. When other users or administrators visit these pages, the scripts execute, potentially leading to unauthorized actions or data theft.

Technologies: Brainstorm Force Spectra. Vendors: Brainstorm Force.

Quick answers

Is CVE-2026-12900 exploited in the wild?: No. Junglewise Threat Intelligence has no report of CVE-2026-12900 being exploited in the wild.
How severe is CVE-2026-12900?: Medium severity, with a CVSS score of 6.4, published 20 July 2026.
Which products and versions are affected?: Brainstorm Force Spectra up to, and including, 2.19.28.
Is there a fix for CVE-2026-12900?: 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-2026-12900 attacked?: It is attacked over the network, in a software library.
Am I affected by CVE-2026-12900?: Check whether you run Brainstorm Force Spectra 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

The Spectra Gutenberg Blocks plugin (formerly Ultimate Addons for Gutenberg) is vulnerable to Stored Cross-Site Scripting (XSS) due to insufficient input sanitization and output escaping on the 'uagb/image' block. An authenticated attacker with Contributor-level permissions or higher can inject arbitrary web scripts into the block's attributes. Because the plugin fails to properly neutralize this input before it is stored and subsequently rendered, the script will execute in the browser of any user who views the affected page. This vulnerability is tracked as CWE-79 and affects all versions up to and including 2.19.28.

Affected products

Brainstorm Force Spectra – WordPress Gutenberg Blocks up to, and including, 2.19.28

Timeline

2026-07-20: disclosed: Initial publication of the CVE record.
2026-07-20: advisory: Wordfence published the vulnerability details.

References

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