MacCMS v10 before 2026.1000.4054 Account Takeover via Unbound Password Recovery Code

Summary

MacCMS v10 before 2026.1000.4054 contains an authentication bypass vulnerability that allows unauthenticated attackers to reset any member's password because check_msg() never compares msg_to. Attackers can request a recovery code to their own mailbox via user/findpass_msg, then submit it to user/findpass_reset with the victim's email or phone to take over the account.

Remediation

1. Inventory every maccmspro maccms10 deployment, including staging.
2. Upgrade maccmspro maccms10 to 2026.1000.4054.
3. Confirm the running version after the upgrade.

References

• Patchhttps://github.com/magicblack/maccms10/commit/27bb1b004b9931c93f46b65e9c0e531466e7e02a
• Advisoryhttps://www.vulncheck.com/advisories/maccms-v10-before-2026.1000.4054-account-takeover-via-unbound-password-recovery-code
• Referencehttps://github.com/maccmspro/maccms10
• Referencehttps://github.com/maccmspro/maccms10/blob/7f388ee0008faf5b01e5df7bf5e5a6ff4bbe13e8/application/common/model/User.php#L607-L630
• Referencehttps://github.com/maccmspro/maccms10/issues/30