The Spectra Legacy WordPress plugin before 2.20.0 does not validate or escape several block style attributes before using them to build the CSS it outputs on the front end, allowing users with the Contributor role and above to inject arbitrary CSS into the pages that render the affected block. The injected styles are served to anonymous visitors of those pages and can force external resource loads, deface/redress the page, or exfiltrate data via CSS attribute selectors. JavaScript execution is not possible at this role (the script-tag breakout is removed by KSES), so the impact is limited to CSS injection.

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Fixes

Solution

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Workaround

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History

Wed, 11 Nov 2026 12:15:00 +0000

Type Values Removed Values Added
First Time appeared Wordpress-extensions
Wordpress-extensions spectra
Vendors & Products Wordpress-extensions
Wordpress-extensions spectra

Wed, 05 Aug 2026 17:30:00 +0000

Type Values Removed Values Added
Weaknesses CWE-345
Metrics cvssV3_1

{'score': 3.5, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:U/C:L/I:L/A:N'}

ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'poc', 'Technical Impact': 'partial'}, 'version': '2.0.3'}


Sun, 02 Aug 2026 04:00:00 +0000

Type Values Removed Values Added
Weaknesses CWE-1075

Sat, 01 Aug 2026 06:45:00 +0000

Type Values Removed Values Added
Description The Spectra Legacy WordPress plugin before 2.20.0 does not validate or escape several block style attributes before using them to build the CSS it outputs on the front end, allowing users with the Contributor role and above to inject arbitrary CSS into the pages that render the affected block. The injected styles are served to anonymous visitors of those pages and can force external resource loads, deface/redress the page, or exfiltrate data via CSS attribute selectors. JavaScript execution is not possible at this role (the script-tag breakout is removed by KSES), so the impact is limited to CSS injection.
Title Spectra (Ultimate Addons for Gutenberg) < 2.20.0 - Contributor+ Stored CSS Injection via Block Attributes
References

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cve-icon MITRE

Status: PUBLISHED

Assigner: WPScan

Published:

Updated: 2026-08-05T16:19:22.442Z

Reserved: 2026-06-04T09:35:44.199Z

Link: CVE-2026-10827

cve-icon Vulnrichment

Updated: 2026-08-05T16:07:56.983Z

cve-icon NVD

Status : Deferred

Published: 2026-08-01T07:16:28.573

Modified: 2026-08-26T16:31:36.750

Link: CVE-2026-10827

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-11-11T09:42:17Z

Weaknesses