RCE in Maxsite Cms
CVE-2026-7012
A vulnerability was detected in MaxSite CMS up to 109.3. This affects an unknown part of the component Redirect Plugin. The manipulation of the argument f_all/f_all404 results in cross site scripting. The attack can be launched remotely. The exploit is now public and may be used. Upgrading to version 109.4 is able to mitigate this issue. The patch is identified as 8a3946bd0a54bfb72a4d57179fcd253f2c550cd7. You should upgrade the affected component. The vendor was informed early about this issue. They classify it as a "Self-XSS". They deployed a countermeasure: "Nevertheless, we consider this a violation of secure coding standards. The lack of filtering via `htmlspecialchars()` has already been fixed in the latest patch to prevent incorrect data display."
Vulnerability class: XSS (Cross-Site Scripting)
Published · last modified .
CVSS v3 metric
CVSS v3 base score 2.4 (Low). Vector: CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:U/C:N/I:L/A:N.
EPSS exploit prediction
EPSS: 0.004 (29.0th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 29th percentile — 29.0% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.003 · newest: 0.004 · change: +0.001
Affected products
- Maxsite Cms — versions 109.0, 109.1, 109.2
Weakness classification (CWE)
References
- vuldb.com/vuln/359593 (technical-description, vdb-entry)
- vuldb.com/vuln/359593/cti (signature, permissions-required)
- vuldb.com/submit/796737 (third-party-advisory)
- github.com/wnaspy/CVE/blob/main/Report- Stored XSS-in-redirect-plugin-maxsite-c… (exploit)
- github.com/maxsite/cms/commit/8a3946bd0a54bfb72a4d57179fcd253f2c550cd7 (patch)
- github.com/maxsite/cms/releases/tag/v109 (patch)
- github.com/maxsite/cms/ (product)
Frequently asked questions
- What is CVE-2026-7012?
- CVE-2026-7012 is a low-severity vulnerability in Maxsite Cms, classified under Cross-site Scripting. CVSS score: 2.4/10. Published 2026-04-26.
- How severe is CVE-2026-7012?
- Low severity. CVSS v3 base score is 2.4 out of 10.