MaxSite MaxSite CMS
Published Atomicorp research notes for CVEs affecting MaxSite MaxSite CMS where WAF protections were observed during testing or engineering review.
These notes are not intended to represent the full set of vulnerabilities mitigated by Atomicorp products and should not be interpreted as a coverage matrix, certification list, or census of protected CVEs.
Atomicorp WAF protections are primarily designed around attack techniques and exploit behaviors rather than individual vulnerability identifiers. A published research note documents a positive research finding related to that CVE. If a CVE is absent from these notes, no conclusion should be drawn about protection status.
| CVE | Vulnerability | CVSS | Severity | Rules Observed |
|---|---|---|---|---|
| CVE-2026-70553 | MaxSite CMS Unauthenticated RCE via Install Endpoint | 9.3 (v4.0) | Critical | 340014 , 340023 , 340029 , 344360 , 344361 , 344363 , 344364 , 344366 , 344370 , 393655 |
| CVE-2026-87930 | MaxSite CMS through 109.6 PHP Object Injection via ci_session | 9.2 (v4.0) | Critical | 340014 , 340023 , 340193 , 344362 , 344363 , 344365 , 344370 , 344380 , 344382 , 344385 , 390613 , 390614 , 390722 |
| CVE-2026-87927 | MaxSite CMS through 109.6 Local File Inclusion via ajax dispatcher | 8.8 (v4.0) | High | 340007 , 344360 , 347009 , 390709 |
| CVE-2021-35265 | MaxSite CMS > V106 - Cross-Site Scripting | 6.1 (v3.1) | Medium | 346755 , 347198 |