Threat intelligence

Sydney <= 2.56 - Missing Authorization to Authenticated (Subscriber+) Limited Theme Options Update

CVE-2025-8999 · sydney

Important: Seeing this vulnerability listed does not mean your website is affected. Exposure depends on whether you run Sydney at a vulnerable version. How SiteRespond intelligence works

Vulnerability: Sydney <= 2.56 - Missing Authorization to Authenticated (Subscriber+) Limited Theme Options Update
Affected software: sydney(Theme)
Affected versions: ≤ 2.56
Authentication: Authenticated (see advisory title)
Vulnerability type: Other
CVE: CVE-2025-8999
Published: 16 September 2025
CISA KEV: Not listed in CISA KEV at last catalog refresh
Impact: This advisory describes a other issue in the affected software. Review the source advisory and your installed version to assess exposure.
Source: Data imported from Wordfence Intelligence (advisory 965582c6-a52e-4f88-81ef-b5dd761a0c23). Methodology and redistribution notes

Check whether your installed version is affected

SiteRespond Defence matches your installed Sydney version against this catalog when the Defence plugin is connected to your WordPress site.

Start SiteRespond Defence for WordPress — £29.99/monthScan your website

All Sydney advisoriesBack to catalog