CVE-2024-7437

Think of SMF like a customer-service desk where staff delete or update user-related items. This bug lets someone with limited permissions tweak a specific “instruction” in a website link so the system may process the wrong resource identifier, which can lead to disruption (for example, breaking or interfering with user/account actions).

This matters to you if you run Simple Machines Forum (SMF) and specifically use version 2.1.4. It’s most relevant when low-privileged accounts can reach the affected profile “remove” flow, because the issue requires low privileges and no special user interaction.

Reachability gate: it’s a risk if the vulnerable endpoint is reachable by a low-privileged user on your site (network-accessible in default configurations).

The community has a public proof-of-concept, and public attention is rising, so this is more than a theoretical issue. Even though no CISA KEV listing was found and a fixed patch isn’t known from the available information, this still warrants an AMBER response because attackers only need low privileges and no user interaction to try the technique.

1. Confirm exposure

   • Identify your exact SMF version (confirm whether it is 2.1.4).
   • Determine whether low-privileged users (not admins) can reach or trigger the affected flow that ends at:
     • /index.php?action=profile;u=2;area=showalerts;do=remove

2. Assess whether exploitation is feasible in your setup

   • Review your permission model to see if low-privileged users can access the profile/remove alert functionality.
   • Check web server/app logs for requests to the endpoint above, especially those with unusual or changed query parameters (the weakness involves manipulation of the 'aid' argument).

3. Remediation (patch availability)

   • Available patch information indicates no fix/patch information is available.
   • If you are on 2.1.4, ask your SMF maintainer/vendor (or hosting provider) for an official mitigation or patched release.

4. Temporary risk reduction while waiting for a fix

   • Tighten access: limit who can access low-privileged actions connected to the profile/remove alert flow.
   • Reduce reachable surface: if your admin controls allow disabling or restricting the specific profile alert/remove functionality, apply that restriction until you have an official fix.
   • Monitor: watch for repeated hits to the vulnerable endpoint from the same account/session, and for parameter patterns that differ from normal traffic.

5. What to monitor after changes

   • Continued attempts hitting /index.php?action=profile;u=2;area=showalerts;do=remove.
   • Any related account/profile alert removal failures or unusual changes in user-related behavior.

CISA due date

• Not applicable here: CVE-2024-7437 is not listed in the provided CISA KEV information.

Severity and status: The vulnerability is reported as medium in scoring (CVSS 5.4) with an AMBER operational verdict. No CISA KEV listing was provided, but there is a public proof-of-concept and rising press attention.

Mechanism: The weakness is described as resource identifier control bypass via improper handling of the 'aid' argument passed to /index.php?action=profile;u=2;area=showalerts;do=remove. By manipulating 'aid' in the URL, a low-privileged user can cause the application to process an unintended resource identifier, potentially impacting integrity and availability.

Attack vector and prerequisites: Remote/network reachable, no user interaction required, and low privileges are sufficient. The issue is reachable in default configuration.

Patch state: No fixed version information is available from the provided patch findings, so remediation relies on vendor/maintainer guidance and compensating controls.

Exploit maturity: At least one public proof-of-concept exists (GitHub), indicating the technique is publicly known. No KEV exploitation confirmation was provided in the findings.