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cve.new
GHSA-7p9h-m7m8-vhhvmedium6.5

phpMyFAQ: Attachment download allowed without dlattachment right (broken access control)

Check your stack

The advisory, in context

Summary

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.

Details

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.

PoC

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"

Impact

Unauthorized users can download attachments (confidentiality breach). Depending on content, this may expose sensitive documents.

Affected packages

Start with the recorded fix for your release branch. Check your installed version and test compatibility before upgrading. Fixing this advisory does not rule out other vulnerabilities in the release.

Ecosystem versions

Earlier releases before 4.0.17

Fixed in 4.0.17

155 explicitly affected versions

2.10.0-alpha, 2.8.0, 2.8.0-RC, 2.8.0-RC2, 2.8.0-RC3, 2.8.0-RC4, 2.8.0-alpha2, 2.8.0-alpha3, 2.8.0-beta, 2.8.0-beta2, 2.8.0-beta3, 2.8.1, 2.8.10, 2.8.11, 2.8.12, 2.8.13, 2.8.14, 2.8.15, 2.8.16, 2.8.17, 2.8.18, 2.8.19, 2.8.2, 2.8.20, 2.8.21, 2.8.22, 2.8.23, 2.8.24, 2.8.25, 2.8.26, 2.8.27, 2.8.28, 2.8.29, 2.8.3, 2.8.4, 2.8.5, 2.8.6, 2.8.7, 2.8.8, 2.8.9, 2.9.0, 2.9.0-alpha, 2.9.0-alpha2, 2.9.0-alpha3, 2.9.0-alpha4, 2.9.0-beta, 2.9.0-beta2, 2.9.0-rc, 2.9.0-rc2, 2.9.0-rc3, 2.9.0-rc4, 2.9.1, 2.9.10, 2.9.11, 2.9.12, 2.9.13, 2.9.2, 2.9.3, 2.9.4, 2.9.5, 2.9.6, 2.9.7, 2.9.8, 2.9.9, 3.0.0, 3.0.0-RC, 3.0.0-RC.2, 3.0.0-alpha, 3.0.0-alpha.2, 3.0.0-alpha.3, 3.0.0-alpha.4, 3.0.0-beta, 3.0.0-beta.2, 3.0.0-beta.3, 3.0.1, 3.0.10, 3.0.11, 3.0.12, 3.0.2, 3.0.3, 3.0.4, 3.0.5, 3.0.6, 3.0.7, 3.0.8, 3.0.9, 3.1.0, 3.1.0-RC, 3.1.0-alpha, 3.1.0-alpha.2, 3.1.0-alpha.3, 3.1.0-beta, 3.1.1, 3.1.10, 3.1.11, 3.1.12, 3.1.13, 3.1.14, 3.1.15, 3.1.16, 3.1.17, 3.1.18, 3.1.2, 3.1.3, 3.1.4, 3.1.5, 3.1.6, 3.1.7, 3.1.8, 3.1.9, 3.2.0, 3.2.0-RC, 3.2.0-RC.2, 3.2.0-RC.4, 3.2.0-alpha, 3.2.0-beta, 3.2.0-beta.2, 3.2.1, 3.2.10, 3.2.2, 3.2.3, 3.2.4, 3.2.5, 3.2.6, 3.2.7, 3.2.8, 3.2.9, 4.0.0, 4.0.0-RC, 4.0.0-RC.2, 4.0.0-RC.3, 4.0.0-RC.4, 4.0.0-RC.5, 4.0.0-alpha, 4.0.0-alpha.2, 4.0.0-alpha.3, 4.0.0-alpha.4, 4.0.0-beta, 4.0.0-beta.2, 4.0.1, 4.0.10, 4.0.11, 4.0.12, 4.0.13, 4.0.14, 4.0.15, 4.0.16, 4.0.2, 4.0.3, 4.0.4, 4.0.5, 4.0.6, 4.0.7, 4.0.8, 4.0.9

View affected-version evidence
{
  "ranges": [
    {
      "events": [
        {
          "introduced": "0"
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        {
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    "4.0.5",
    "4.0.6",
    "4.0.7",
    "4.0.8",
    "4.0.9"
  ]
}
Ecosystem versions

Earlier releases before 4.0.17

Fixed in 4.0.17

155 explicitly affected versions

2.10.0-alpha, 2.8.0, 2.8.0-RC, 2.8.0-RC2, 2.8.0-RC3, 2.8.0-RC4, 2.8.0-alpha2, 2.8.0-alpha3, 2.8.0-beta, 2.8.0-beta2, 2.8.0-beta3, 2.8.1, 2.8.10, 2.8.11, 2.8.12, 2.8.13, 2.8.14, 2.8.15, 2.8.16, 2.8.17, 2.8.18, 2.8.19, 2.8.2, 2.8.20, 2.8.21, 2.8.22, 2.8.23, 2.8.24, 2.8.25, 2.8.26, 2.8.27, 2.8.28, 2.8.29, 2.8.3, 2.8.4, 2.8.5, 2.8.6, 2.8.7, 2.8.8, 2.8.9, 2.9.0, 2.9.0-alpha, 2.9.0-alpha2, 2.9.0-alpha3, 2.9.0-alpha4, 2.9.0-beta, 2.9.0-beta2, 2.9.0-rc, 2.9.0-rc2, 2.9.0-rc3, 2.9.0-rc4, 2.9.1, 2.9.10, 2.9.11, 2.9.12, 2.9.13, 2.9.2, 2.9.3, 2.9.4, 2.9.5, 2.9.6, 2.9.7, 2.9.8, 2.9.9, 3.0.0, 3.0.0-RC, 3.0.0-RC.2, 3.0.0-alpha, 3.0.0-alpha.2, 3.0.0-alpha.3, 3.0.0-alpha.4, 3.0.0-beta, 3.0.0-beta.2, 3.0.0-beta.3, 3.0.1, 3.0.10, 3.0.11, 3.0.12, 3.0.2, 3.0.3, 3.0.4, 3.0.5, 3.0.6, 3.0.7, 3.0.8, 3.0.9, 3.1.0, 3.1.0-RC, 3.1.0-alpha, 3.1.0-alpha.2, 3.1.0-alpha.3, 3.1.0-beta, 3.1.1, 3.1.10, 3.1.11, 3.1.12, 3.1.13, 3.1.14, 3.1.15, 3.1.16, 3.1.17, 3.1.18, 3.1.2, 3.1.3, 3.1.4, 3.1.5, 3.1.6, 3.1.7, 3.1.8, 3.1.9, 3.2.0, 3.2.0-RC, 3.2.0-RC.2, 3.2.0-RC.4, 3.2.0-alpha, 3.2.0-beta, 3.2.0-beta.2, 3.2.1, 3.2.10, 3.2.2, 3.2.3, 3.2.4, 3.2.5, 3.2.6, 3.2.7, 3.2.8, 3.2.9, 4.0.0, 4.0.0-RC, 4.0.0-RC.2, 4.0.0-RC.3, 4.0.0-RC.4, 4.0.0-RC.5, 4.0.0-alpha, 4.0.0-alpha.2, 4.0.0-alpha.3, 4.0.0-alpha.4, 4.0.0-beta, 4.0.0-beta.2, 4.0.1, 4.0.10, 4.0.11, 4.0.12, 4.0.13, 4.0.14, 4.0.15, 4.0.16, 4.0.2, 4.0.3, 4.0.4, 4.0.5, 4.0.6, 4.0.7, 4.0.8, 4.0.9

View affected-version evidence
{
  "ranges": [
    {
      "events": [
        {
          "introduced": "0"
        },
        {
          "fixed": "4.0.17"
        }
      ],
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    }
  ],
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    "2.8.0",
    "2.8.0-RC",
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    "2.8.0-alpha2",
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    "2.8.0-beta",
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    "2.8.1",
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  ]
}

References