How to Fix CVE-2026-7015: CMS (Bundle Sibling)

By Sai Kiran Pandrala

Last verified: 2026-05-25

CVE-2026-7015 is a sibling vulnerability in the same vendor advisory as CVE-2026-7011. Applying the patched build named in the primary write-up closes this CVE as well.

What's different about CVE-2026-7015?

A vulnerability has been found in MaxSite CMS up to 109.3. This issue affects some unknown processing of the component Guestbook Plugin. Such manipulation of the argument f_text/f_slug/f_limit/f_email leads to cross site scripting. The attack may be launched remotely. The exploit has been disclosed to the public and may be used. Upgrading to version 109.4 is capable of addressing this issue. The name of the patch is 8a3946bd0a54bfb72a4d57179fcd253f2c550cd7. It is suggested to upgrade the affected component. The vendor was informed early about this issue. They classify it as a "Self-XSS".

The technical impact and remediation are identical to the primary CVE in the bundle. The same vendor patch closes both.

How to fix CVE-2026-7015

Apply the patched build per the primary write-up: How to Fix CVE-2026-7011.

The patch installation procedure, verification commands, and interim mitigations are documented there. Reusing one runbook keeps the rollout consistent across the bundle.

Frequently asked questions

Is CVE-2026-7015 fixed by the same patch as CVE-2026-7011?

Yes. CVE-2026-7015 ships in the same vendor advisory as CVE-2026-7011. Applying the patched build named in the primary write-up closes both.

What is the CVSS score for CVE-2026-7015?

The CVSS base score is 4.8 (Medium).

Is it being exploited?

It is not currently listed in CISA KEV.

References

• Official vendor advisory: https://github.com/maxsite/cms/commit/8a3946bd0a54bfb72a4d57179fcd253f2c550cd7
• NVD entry: https://nvd.nist.gov/vuln/detail/CVE-2026-7015
• CISA KEV catalog: https://www.cisa.gov/known-exploited-vulnerabilities-catalog
• Primary write-up: How to Fix CVE-2026-7011

*Part of the CMS bundle. Full procedure at CVE-2026-7011.*