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CVE-2026-10827

LOW 3.5 CVSS 3.1
Published
August 1, 2026
Last modified
August 26, 2026
NVD status
Deferred
Reported by
contact@wpscan.com
Weakness
CWE-345
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:U/C:L/I:L/A:N

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.

Affected WordPress components

  • Spectra Legacy – Gutenberg Blocks Plugin · ultimate-addons-for-gutenberg
    Confirmed match Active
    Before 2.20.0
    View on WordPress.org

A confirmed match is backed by the plugin or theme slug. A possible match is based on the product name only and should be verified.

Affected products and versions

  • Unknown Spectra Legacy — Before 2.20.0

References

  • wpscan.com https://wpscan.com/vulnerability/068ac525-423b-42f8-9ef4-f102f948dc78/
  • nvd.nist.gov Official NVD record