Auth bypass in Nitropack – Performance, Page Speed & Cache Plugin For Core Web Vitals, Cdn Image Optimization
CVE-2025-8778
The NitroPack plugin for WordPress is vulnerable to unauthorized modification of data due to a missing capability check on the nitropack_set_compression_ajax() function in all versions up to, and including, 1.18.4. This makes it possible for authenticated attackers, with Subscriber-level access and above, to update the nitropack-enableCompression option and effectively change plugin compression settings.
Vulnerability class: Broken Access Control
Published · last modified .
CVSS v3 metric
CVSS v3 base score 4.3 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N.
EPSS exploit prediction
EPSS: 0.002 (13.8th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 14th percentile — 13.8% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.002 · newest: 0.002 · change: 0.000
Affected products
Weakness classification (CWE)
References
Frequently asked questions
- What is CVE-2025-8778?
- CVE-2025-8778 is a medium-severity vulnerability in Nitropack – Performance, Page Speed & Cache Plugin For Core Web Vitals, Cdn Image Optimization, classified under Missing Authorization. CVSS score: 4.3/10. Published 2025-09-10.
- How severe is CVE-2025-8778?
- Medium severity. CVSS v3 base score is 4.3 out of 10.