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CVE-2026-56396· NVD / CVE Program· CNA VulnCheck

phpMyFAQ - Privilege Escalation via Missing Authorization in editUser() and updateUserRights()

phpMyFAQ before 4.1.4 contains missing authorization vulnerabilities in editUser() and updateUserRights() endpoints that allow authenticated administrators to escalate privileges. Non-SuperAdmin users with edit_user permission can set is_superadmin flag or grant arbitrary rights to escalate to SuperAdmin access.

HighCVSS 8.7 · v4.0—No exploit Fix available

Noroxi analysis

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Published
Jun 21, 2026
Updated
Jun 23, 2026
EPSS
0.4% · 36th percentile
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Report tools

JSON

Action score

34

Monitor

Low priority for now.

CVSS
34 / 40 · 8.7 / 10
CISA KEV
0 / 30 · Not listed
EPSS
0 / 30 · 0.4%

CISA SSVC decision

Exploitation
proof of concept
Automatable
no
Technical impact
total

Vulnrichment: CISA's decision-tree inputs.

CNA vs NVD score

NVD
—
CNA · VulnCheck
8.7
NVD has not scored this yet; the score shown is the CNA’s.

CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N

The score given by the assigning authority versus NVD’s independent score. A gap means the severity is contested.

Affected systems

—

Versions reported by the vendor

Affected version ranges reported by the assigning authority (VulnCheck). Independent of NVD's CPE analysis and usually ahead of it.

  • phpMyFAQ phpMyFAQ

    • 4.1.4not affected
    • before 4.1.4affected · semver

Package-level exposure

OSV and GitHub Advisory data: ecosystem, package and range. SBOM matching uses this table.

EcosystemPackageAffected rangeFix
Packagistphpmyfaq/phpmyfaqbefore 4.1.44.1.4
Packagistthorsten/phpmyfaqbefore 4.1.44.1.4

Same product

phpmyfaq: all records

Other highest-scoring records for the same primary product.

  • CVE-2025-59943phpMyFAQ duplicate email registration allows multiple accounts with the same email
    39Monitor
  • CVE-2023-5865Insufficient Session Expiration in thorsten/phpmyfaq
    39Monitor
  • CVE-2023-5227Unrestricted Upload of File with Dangerous Type in thorsten/phpmyfaq
    39Monitor
  • CVE-2023-4006Improper Neutralization of Formula Elements in a CSV File in thorsten/phpmyfaq
    39Monitor
  • CVE-2023-2429Improper Access Control in thorsten/phpmyfaq
    39Monitor
  • CVE-2023-1886Authentication Bypass by Capture-replay in thorsten/phpmyfaq
    39Monitor

Remediation

Which version to upgrade to

Fix versions compiled from the vendor, package registries and Microsoft. Verify the vendor's note before upgrading.

Product / packageFixed versionSource
phpMyFAQ phpMyFAQ4.1.4Vendor (CNA)
Packagist:phpmyfaq/phpmyfaq4.1.4Package registry (OSV)
Packagist:thorsten/phpmyfaq4.1.4Package registry (OSV)

Exploit status

No known public exploit

No public exploit has been observed yet. That doesn't mean you're safe, only that the bar is a little higher.

Research context

For pentesters and researchers: attack profile, score disagreement, timeline, patch commits, credits, variant and chain candidates, bug bounty scope. All derived from existing data; no exploit code.

Timeline

From publication to today: proof of concept, Metasploit module, CISA KEV and fix record. Dates are as reported by the sources.

No dated events beyond publication.

EPSS, last 120 days

FIRST EPSS daily score; only changes of 0.01 or more are recorded (step chart).

Patch and commit links

Commit, PR and diff links among the references. A starting point for patch-diffing and variant hunting; fixes, not exploits.

No commit or PR link among the references.

Credits

All researchers

Finders, reporters and analysts named in the CNA record. Click a name for that researcher’s other records.

Variant candidates

Same product, same weakness class, within 18 months. If the patch missed the root cause, the sibling bug is here.

  • CVE-2026-27836114 days apartphpMyFAQ Allows Unauthenticated Account Creation via WebAuthn Prepare Endpoint
    30Monitor
  • CVE-2026-7621559 days apartphpMyFAQ before 4.1.7 Missing Authorization via child resources
    27Monitor
  • CVE-2026-24421149 days apartphpMyFAQ missing authorization exposes /api/setup/backup to any authenticated user
    27Monitor
  • CVE-2026-7620959 days apartphpMyFAQ before v4.1.6 Registration Bypass via API
    21Monitor
  • CVE-2026-7621159 days apartphpMyFAQ before 4.1.7 Information Disclosure via Admin API
    21Monitor

Chain candidates

An authentication bypass and a privilege-requiring bug in the same product, published close together: combined they may become an unauthenticated path.

—

Bug bounty scope

No known public program.

Source: bounty-targets-data (public HackerOne, Bugcrowd, Intigriti, YesWeHack listings).

Technical details

Attack conditions

  • Anyone who can reach it over the internet can trigger it.
  • A low-privileged account is enough.
  • No user action is required.
  • No special conditions are required; it is repeatable.

If successful

Confidentiality
Integrity
Availability
Attack vector
Network
Attack complexity
Low
Privileges required
Low
User interaction
None
Scope
X

Weakness class (CWE)

CWE-862 · Missing Authorization

CVSS vector

CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

nvd-secondary

Attack context

MITRE CAPEC attack patterns and ATT&CK techniques for this weakness class (CWE). A starting point for detection rules and threat hunting.

Change log

  1. Fix✗ → ✓

For records you follow, these changes also arrive as notifications. →

References

Vendor advisories and official records. Exploit/PoC links are deliberately left out.

All records