CVE-2015-8354

Ultimate Member <= 1.3.28 - Reflected Cross-Site Scripting

2015-12-02 00:00

Strategic Overview

Status: Patched in 1.3.29
Affected Plugin: Ultimate Member – User Profile, Registration, Login, Member Directory, Content Restriction & Membership Plugin
Affected Version: < 1.3.29
CVSS: 6.1Medium
Weakness type: CWE-79 · Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
CVE: CVE-2015-8354

View all Ultimate Member – User Profile, Registration, Login, Member Directory, Content Restriction & Membership Plugin vulnerabilities

At a glance

CVE-2015-8354 is a medium-severity Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') vulnerability in the Ultimate Member WordPress plugin, affecting versions < 1.3.29. It carries a CVSS score of 6.1 (reachable over the network; low attack complexity). Exploitation requires no authentication. The issue is fixed in version 1.3.29; sites on affected versions should update now. Disclosed December 2015, reported by High-Tech Bridge Security Research Lab.

Vulnerability Overview

Cross-site scripting (XSS) vulnerability in the Ultimate Member WordPress plugin before 1.3.29 for WordPress allows remote attackers to inject arbitrary web script or HTML via the _refer parameter to wp-admin/users.php.

Technical Analysis

The vector marks this flaw as remotely reachable over the network, with low attack complexity — no special timing or configuration is needed, and no privileges on the target site.

CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')

Reaching this weakness in Ultimate Member < 1.3.29 takes a caller who can reach the endpoint. Cross-site scripting happens when input from a request is written into a page without being escaped for the context it lands in, so the browser parses attacker-supplied text as markup or script.

Injected script runs with the privileges of whoever views the affected page, which is how these flaws turn into administrator session theft, silent account creation or persistent backdoors in page content. For Ultimate Member the fix is 1.3.29: builds < 1.3.29 are affected, anything from 1.3.29 onward is not.

Remediation

Update to version 1.3.29, or a newer patched version

How does WordSec protect against this?

The attempt arrives as an ordinary request to Ultimate Member: WordSec's web application firewall inspects request payloads before WordPress loads them. None of that substitutes for the fix: Ultimate Member 1.3.29 closes this, and updating the plugin is the step that ends it.

Firewall
Alerts

External References

https://www.cve.org/CVERecord?id=CVE-2015-8354 https://www.wordfence.com/threat-intel/vulnerabilities/id/97fd7952-a7f0-4797-82cd-840c0a3e5fbe https://nvd.nist.gov/vuln/detail/CVE-2015-8354

Related records

Same weakness class

Other vulnerabilities in Ultimate Member – User Profile, Registration, Login, Member Directory, Content Restriction & Membership Plugin

CVSS Vector

6.1

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N

Base

Attack VectorNetwork
Attack ComplexityLow
Privileges RequiredNone
User InteractionRequired
ScopeChanged
ConfidentialityLow
IntegrityLow
AvailabilityNone

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