CVE-2015-9505

Easy Digital Downloads – Simple eCommerce for Selling Digital Files <= 2.3.6 - Cross-Site Scripting

2015-04-20 00:00

Strategic Overview

Status: Patched in 1.8.7
Affected Plugin: Easy Digital Downloads – eCommerce Payments and Subscriptions made easy
Affected Version: 1.8.7 – < 2.3.7 · 6 branches
CVSS: 6.1Medium
Weakness type: CWE-79 · Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
CVE: CVE-2015-9505

View all Easy Digital Downloads – eCommerce Payments and Subscriptions made easy vulnerabilities

At a glance

CVE-2015-9505 is a medium-severity Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') vulnerability in the Easy Digital Downloads WordPress plugin, affecting versions 1.8.7 – < 2.3.7 · 6 branches. 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 1.8.7; sites on affected versions should update now. Disclosed April 2015.

Vulnerability Overview

The Easy Digital Downloads (EDD) core component 1.8.x before 1.8.7, 1.9.x before 1.9.10, 2.0.x before 2.0.5, 2.1.x before 2.1.11, 2.2.x before 2.2.9, and 2.3.x before 2.3.7 for WordPress has XSS because add_query_arg is misused.

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 Easy Digital Downloads 1.8.7 – < 2.3.7 · 6 branches 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 Easy Digital Downloads the fix is 1.8.7: builds 1.8.7 – < 2.3.7 · 6 branches are affected, anything from 1.8.7 onward is not.

Remediation

Update to one of the following versions, or a newer patched version: 1.8.7, 1.9.10, 2.0.5, 2.1.11, 2.2.9, 2.3.7

How does WordSec protect against this?

The attempt arrives as an ordinary request to Easy Digital Downloads: WordSec's web application firewall inspects request payloads before WordPress loads them. None of that substitutes for the fix: Easy Digital Downloads 1.8.7 closes this, and updating the plugin is the step that ends it.

Firewall
Alerts

External References

https://www.cve.org/CVERecord?id=CVE-2015-9505 https://www.wordfence.com/threat-intel/vulnerabilities/id/be60027e-9d6a-4740-b20c-6be3e115d9fe https://nvd.nist.gov/vuln/detail/CVE-2015-9505

Related records

Same weakness class

Other vulnerabilities in Easy Digital Downloads – eCommerce Payments and Subscriptions made easy

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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