[Japanese]

JVNDB-2018-000045

Multiple vulnerabilities in WordPress plugin "Ultimate Member"

Overview

The WordPress plugin "Ultimate Member" provided by Ultimate Member contains multiple vulnerabilities listed below.

* Cross-site Scripting (CWE-79) - CVE-2018-0585
* Directory Traversal in the shortcodes function (CWE-22) - CVE-2018-0586
* Arbitrary File Upload (CWE-434) - CVE-2018-0587
* Directory Traversal in the AJAX function (CWE-22) - CVE-2018-0588
* Access Restriction Bypass in the "Forms" page (CWE-284) - CVE-2018-0589
* Access Restriction Bypass due to an issue in processing "Role" (CWE-284) - CVE-2018-0590

Gen Sato of Mitsui Bussan Secure Directions, Inc. reported this vulnerability to IPA.
JPCERT/CC coordinated with the developer under Information Security Early Warning Partnership.
CVSS Severity (What is CVSS?)

CVSS V3 Severity:
Base Metrics 7.2 (High) [IPA Score]
  • Attack Vector: Network
  • Attack Complexity: Low
  • Privileges Required: None
  • User Interaction: None
  • Scope: Changed
  • Confidentiality Impact: None
  • Integrity Impact: Low
  • Availability Impact: Low
CVSS V2 Severity:
Base Metrics 6.4 (Medium) [IPA Score]
  • Access Vector: Network
  • Access Complexity: Low
  • Authentication: None
  • Confidentiality Impact: None
  • Integrity Impact: Partial
  • Availability Impact: Partial
The above CVSS base scores have been assigned for CVE-2018-0588


CVSS V3 Severity:
Base Metrics: 5.4 (Medium) [IPA Score]
  • Attack Vector: Network
  • Attack Complexity: Low
  • Privileges Required: Low
  • User Interaction: Required: Required
  • Scope: Changed
  • Confidentiality Impact: Low
  • Integrity Impact: Low
  • Availability Impact: None
CVSS V2 Severity:
Base Metrics: 4.0 (Low) [IPA Score]
  • Access Vector: Network
  • Access Complexity: Low
  • Authentication: Single
  • Confidentiality Impact: None
  • Integrity Impact: Partial
  • Availability Impact: None
The above CVSS base scores have been assigned for CVE-2018-0585


CVSS V3 Severity:
Base Metrics: 5.0 (Medium) [IPA Score]
  • Attack Vector: Network
  • Attack Complexity: Low
  • Privileges Required: Low
  • User Interaction: Required: None
  • Scope: Changed
  • Confidentiality Impact: Low
  • Integrity Impact: None
  • Availability Impact: None
CVSS V2 Severity:
Base Metrics: 4.0 (Low) [IPA Score]
  • Access Vector: Network
  • Access Complexity: Low
  • Authentication: Single
  • Confidentiality Impact: Partial
  • Integrity Impact: None
  • Availability Impact: None
The above CVSS base scores have been assigned for CVE-2018-0586


CVSS V3 Severity:
Base Metrics: 5.3 (Medium) [IPA Score]
  • Attack Vector: Network
  • Attack Complexity: Low
  • Privileges Required: None
  • User Interaction: Required: None
  • Scope: Unchanged
  • Confidentiality Impact: None
  • Integrity Impact: Low
  • Availability Impact: None
CVSS V2 Severity:
Base Metrics: 5.0 (Medium) [IPA Score]
  • Access Vector: Network
  • Access Complexity: Low
  • Authentication: None
  • Confidentiality Impact: None
  • Integrity Impact: Partial
  • Availability Impact: None
The above CVSS base scores have been assigned for CVE-2018-0587


CVSS V3 Severity:
Base Metrics: 4.3 (Medium) [IPA Score]
  • Attack Vector: Network
  • Attack Complexity: Low
  • Privileges Required: Low
  • User Interaction: Required: None
  • Scope: Unchanged
  • Confidentiality Impact: Low
  • Integrity Impact: None
  • Availability Impact: None
CVSS V2 Severity:
Base Metrics: 4.0 (Low) [IPA Score]
  • Access Vector: Network
  • Access Complexity: Low
  • Authentication: Single
  • Confidentiality Impact: Partial
  • Integrity Impact: None
  • Availability Impact: None
The above CVSS base scores have been assigned for CVE-2018-0589


CVSS V3 Severity:
Base Metrics: 4.3 (Medium) [IPA Score]
  • Attack Vector: Network
  • Attack Complexity: Low
  • Privileges Required: Low
  • User Interaction: Required: None
  • Scope: Unchanged
  • Confidentiality Impact: Low
  • Integrity Impact: None
  • Availability Impact: None
CVSS V2 Severity:
Base Metrics: 4.0 (Low) [IPA Score]
  • Access Vector: Network
  • Access Complexity: Low
  • Authentication: Single
  • Confidentiality Impact: Partial
  • Integrity Impact: None
  • Availability Impact: None
The above CVSS base scores have been assigned for CVE-2018-0590
Affected Products


Ultimate Member Group Ltd
  • Ultimate Member prior to version 2.0.4

Impact

* An arbitrary script may be executed on the user's web browser - CVE-2018-0585
* Arbitrary local files on the server may be accessed by a logged-in user - CVE-2018-0586
* An arbitrary image file can be uploaded by a remote attacker, which may be used for unauthorized file sharing - CVE-2018-0587
* A remote attacker may delete arbitrary files on the server - CVE-2018-0588
* A user with the Author role may add a new form - CVE-2018-0589
* Profiles for other users may be modified by a logged-in user - CVE-2018-0590
Solution

[Update the plugin]
Update the plugin according to the information provided by the developer.
Vendor Information

Ultimate Member Group Ltd
CWE (What is CWE?)

  1. Improper Input Validation(CWE-20) [IPA Evaluation]
  2. Path Traversal(CWE-22) [IPA Evaluation]
  3. Permissions(CWE-264) [IPA Evaluation]
  4. Cross-site Scripting(CWE-79) [IPA Evaluation]
CVE (What is CVE?)

  1. CVE-2018-0585
  2. CVE-2018-0586
  3. CVE-2018-0587
  4. CVE-2018-0588
  5. CVE-2018-0589
  6. CVE-2018-0590
References

  1. JVN : JVN#28804532
Revision History

  • [2018/05/10]
      Web page was published