CVE-2026-40521 — FrontAccounting < 2.4.20 Path Traversal RCE via attachment upload
FrontAccounting before 2.4.20 contains a path traversal vulnerability in the attachment upload handler that allows authenticated attackers to execute arbitrary code by uploading…
Published: 2026-06-29 · CVSS: 8.7 · CVSS 4.0
FrontAccounting before 2.4.20 contains a path traversal vulnerability in the attachment upload handler that allows authenticated attackers to execute arbitrary code by uploading files with traversal sequences in the unique_name parameter. Attackers can supply path traversal sequences ../../../shell.php to write files outside the intended attachments directory into the web root, and by uploading PHP files without extension validation, achieve remote code execution as the web server user.
Source: CVE Program · Revision 8b16575c39f1e1810c5e863010da073d2d3285e7