Security readout for executives and security teams
Plain-English summary
CVE-2026-24421 lets any logged-in phpMyFAQ user access a backup function intended for administrators. That backup can expose configuration data through a generated ZIP link. The issue affects phpMyFAQ versions 4.0.16 and below and is fixed in 4.0.17.
Executive priority
Treat this as a moderate-priority confidentiality issue. It is not known to be actively exploited, but it can expose sensitive configuration data to any logged-in user. Prioritize upgrades where phpMyFAQ has many users or external access.
Technical view
phpMyFAQ’s /api/setup/backup endpoint checks userIsAuthenticated() but does not enforce admin or configuration permissions. This missing authorization flaw is CWE-862. A low-privileged authenticated user can trigger a configuration backup and receive the generated ZIP path. CVSS is 6.5 with high confidentiality impact.
Likely exposure
Exposure is limited to phpMyFAQ deployments running versions below 4.0.17 where untrusted or lower-privileged users can authenticate. Internet-facing instances with broad user registration or many non-admin accounts have higher practical risk.
Exploitation context
The provided sources do not report active exploitation, and the CVE is not marked as CISA KEV. Exploitation requires a valid authenticated account, low complexity, and no user interaction, according to the CVSS vector.
Researcher notes
Key issue is authorization, not authentication. The vulnerable endpoint relies on authentication status without permission checks. Sources identify the fixed version but do not provide broader workaround details beyond upgrading and consulting vendor guidance.
Mitigation direction
- Upgrade phpMyFAQ to version 4.0.17 or later.
- Review vendor advisory for any additional operational guidance.
- Limit phpMyFAQ accounts to trusted users until upgraded.
- Review access to setup or backup functionality after remediation.
Validation and detection
- Inventory phpMyFAQ instances and identify versions below 4.0.17.
- Confirm whether non-admin authenticated users exist on affected instances.
- Verify the deployed version reports 4.0.17 or later after upgrade.
- Review application logs for unexpected backup activity if logs are available.
Public sources used
Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.
Conservative CVE-to-ATT&CK context
These mappings and lookup hints may be relevant to the vulnerability behavior, CWE, affected product, or exposure path. Glexia-inferred context is not an official MITRE, ATT&CK, CWE, or CVE Program mapping.
ATT&CK lookup starting points
Use these exact CWE pages and searches to review the Glexia ATT&CK library from this CVE's weakness and description context.
CWE-862: Authorization and privilege behavior lookup
Authorization weaknesses can support privilege escalation and valid-account review, depending on exploit path. Open the exact CWE lookup page first, then review the ATT&CK searches from that MITRE weakness context. This is a Glexia lookup hint, not an official ATT&CK mapping.
Open ATT&CK lookupCVE-2026-24421 mapping review
Open the CVE-to-ATT&CK bridge for reviewed, inferred, or future official mappings tied to this CVE.
Open ATT&CK lookup- Severity
- Medium
- CVSS
- 6.5 (3.1)
- Known Exploited
- No
- Published
Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
CNA and ADP enrichment extracted from CVE v5
These fields come from the CVE record and ADP containers, not from Glexia's Take. They preserve time-varying source decisions such as CISA SSVC, KEV status, CVSS metrics, and provider references.
CVSS vector scores
1 official scoreWe collect every scored CVSS vector available in the official CNA and ADP containers. When more than one version is present, the table keeps the source vectors side by side instead of collapsing them into the highest score.
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N2.83.6Primary CVE scoreVulnerability scoring details
Base CVSS 3.1 score
6.5MediumVector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
Source materials
- CVE List V5 sourceCVE List V5
- https://github.com/thorsten/phpMyFAQ/security/advisories/GHSA-wm8h-26fv-mg7gCVE reference · x_refsource_CONFIRM
Products and packages named in the record
CWE details
CWE links open Glexia weakness intelligence pages with official CWE context, developer remediation guidance, and related CVE mappings.
Missing Authorization
Missing Authorization represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.