| Package | Affected versions | Patched versions |
|---|---|---|
| phpmyfaq/phpmyfaq | < 4.0.17 | 4.0.17 |
| thorsten/phpmyfaq | < 4.0.17 | 4.0.17 |
| phpmyfaq | < 4.0.17 | 4.0.17 |
A logged‑in user without the dlattachment right can download FAQ attachments. This is due to a permissive permission check in attachment.php that treats the mere presence of a right key as authorization and a flawed group/user logic expression.
In attachment.php, the access decision uses:
($groupPermission || ($groupPermission && $userPermission)) && isset($permission['dlattachment'])
isset() returns true even when the right value is false, and the logic simplifies to $groupPermission for some permission modes. As a result, a user without dlattachment can still access the attachment.
Precondition: A non‑admin user exists; an attachment is associated to a FAQ record; records.allowDownloadsForGuests = false. Log in as a non‑admin user without dlattachment. Request the attachment download endpoint.
curl -c /tmp/pmf_api_cookies.txt \
-H 'Content-Type: application/json' \
-d '{"username":"tester","password":"Test1234!"}' \
http://192.168.40.16/phpmyfaq/api/v3.0/login
curl -i -b /tmp/pmf_api_cookies.txt \
"http://192.168.40.16/phpmyfaq/index.php?action=attachment&id=1"
Unauthorized users can download attachments (confidentiality breach). Depending on content, this may expose sensitive documents.
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