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TI-2026-39379 Aliases CVE-2026-54540GHSA-9643-6xjp-vx57

Authenticated terminal command whitelist bypass in Pheditor

Priority HIGH 73CWE-78Published · Updated

Key facts

Attack vector
Network
Privileges required
Low
User interaction
None
Attack complexity
Low
Impact type
Code execution
Confidentiality · integrity · availability
High · High · High
Fix status
Fixed

Attack profile from CVSS 3.1 · CNA. Fix status from CNA and GitHub. Impact type from CWE-78.

Summary

Pheditor is a single-file editor and file manager written in PHP. Prior to version 2.0.5, there is an authenticated terminal command whitelist bypass. The terminal feature checks whether the submitted command starts with one of the configured TERMINAL_COMMANDS values, then passes the full command string to shell_exec(). Shell command substitution such as $() is not blocked, so an authenticated user with the terminal permission can bypass a restricted command allowlist and execute arbitrary shell commands as the web server user. This issue has been patched in version 2.0.5.

Why it matters now

Exploitation Proof of concept CISA SSVC · not in CISA KEV
EPSS 0.00734 54th percentileScored 2026-11-07
Fix Fixed pheditor (pheditor): 2.0.5pheditor/pheditor (Packagist): 2.0.5

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
Poc
Automatable
No
Technical impact
Total

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
pheditorpheditorbefore 2.0.52.0.5Patch availableCNA
—pheditor/pheditor (Packagist)before 2.0.52.0.5Patch availableGHSA-9643-6xjp-vx57
  • pheditor Vendorpheditor Affected before 2.0.5 Fixed in 2.0.5 Patch available CNA
  • pheditor/pheditor (Packagist) Vendor— Affected before 2.0.5 Fixed in 2.0.5 Patch available GHSA-9643-6xjp-vx57

Remediation

  • Fix · CNA pheditor (pheditor) Fixed in 2.0.5
  • Fix · GHSA-9643-6xjp-vx57 pheditor/pheditor (Packagist) Fixed in 2.0.5 Advisory →

Timeline

  1. 2026-10-02 Threatist record created from CVE-2026-54540
  2. 2026-10-03 Alias added: GHSA-9643-6xjp-vx57

References

Other 3

  • TI-2026-40118 Pheditor: Hardcoded default password 'admin' with no forced change enables full application compromise CVSS 3.1CRITICAL 9.8
  • TI-2026-35473 Pheditor: OS Command Injection in terminal handler via unsanitized 'dir' parameter (CWE-78) CVSS 3.1CRITICAL 9.9
  • TI-2026-40117 OS command injection in pheditor CVSS 3.1HIGH 8.8

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences