CVE-2026-1107 is a remote unrestricted file upload in EyouCMS, scored 6.3 (medium) by NVD. The flaw sits in Diyajax.php and is reached through the viewfile argument. The vendor was contacted early and did not respond. The record names no fixed release, so reduce exposure now and watch for a patch.
What's affected
EyouCMS up to 1.7.1/5.0, in the member avatar handler (the check_userinfo function).
The record says an exploit has been published, so assume that anyone scanning for this product can find the weak spot. It does not say the flaw is exploited in the wild, and it is not marked as a CISA Known Exploited Vulnerability.
How to check if you're exposed
Start with inventory. Find every host that runs EyouCMS, including small installs that sit outside the main asset list. Then confirm whether Diyajax.php is reachable, and from where.
Review web server access logs for requests to Diyajax.php and for odd viewfile values. Also list the upload directories for files that should not be there, such as scripts or archives.
A dependency scan will not see this finding, because the vulnerable code is the product itself and not a library. Track it as a product risk until the vendor ships a fix or you retire the product.
What to do now
- List every deployment of EyouCMS and note which are reachable from the internet.
- Restrict access to Diyajax.php and the admin area at the network layer with an allow list, VPN or authenticated reverse proxy.
- Block script execution in upload folders at the web server, and move uploads outside the web root where you can.
- Remove any unexpected files from upload directories after you have preserved them for review.
- Review logs since publication on 2026-01-18 and rotate credentials stored on the host if you see suspicious activity.
- Plan to patch or replace the product. If the vendor stays silent, migration is the lasting fix.
Why it matters
The weakness classes are CWE-284 (improper access control) and CWE-434 (unrestricted upload of a file with a dangerous type).
The application accepts a file without enough checks on what it is or where it lands. Server side type checks, safe storage locations and no execution rights on upload folders are the standard defenses.
The vendor silence matters as much as the bug. When a project does not answer a disclosure, defenders cannot count on a patch, so the practical choices are to isolate the product or replace it. You can also run the free in-browser dependency scan or browse the Gold directory to see where a package or product shows up in your stack.
Quick check
Is there a patch?
The record names no fixed version and says the vendor did not respond. Check the vendor site and the linked report for news, and apply mitigations in the meantime.
Sources
Last reviewed: 19 October 2026.
