CVE-2014-6243

EWWW Image Optimizer <= 2.0.1 - Reflected Cross-Site Scripting

2014-10-09 00:00

Strategic Overview

Status: Patched in 2.0.2
Affected Plugin: EWWW Image Optimizer
Affected Version: <= 2.0.1
CVSS: 6.1Medium
Weakness type: CWE-79 · Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
CVE: CVE-2014-6243

View all EWWW Image Optimizer vulnerabilities

At a glance

CVE-2014-6243 is a medium-severity Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') vulnerability in the EWWW Image Optimizer WordPress plugin, affecting versions <= 2.0.1. 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 2.0.2; sites on affected versions should update now. Disclosed October 2014, reported by High-Tech Bridge Security Research Lab.

Vulnerability Overview

Cross-site scripting (XSS) vulnerability in the EWWW Image Optimizer plugin before 2.0.2 for WordPress allows remote attackers to inject arbitrary web script or HTML via the error parameter in the ewww-image-optimizer.php page to wp-admin/options-general.php, which is not properly handled in a pngout error message.

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 EWWW Image Optimizer <= 2.0.1 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 EWWW Image Optimizer the fix is 2.0.2: builds <= 2.0.1 are affected, anything from 2.0.2 onward is not.

Remediation

Update to version 2.0.2, or a newer patched version

How does WordSec protect against this?

The attempt arrives as an ordinary request to EWWW Image Optimizer: WordSec's web application firewall inspects request payloads before WordPress loads them. None of that substitutes for the fix: EWWW Image Optimizer 2.0.2 closes this, and updating the plugin is the step that ends it.

Firewall
Alerts

External References

https://www.cve.org/CVERecord?id=CVE-2014-6243 https://www.wordfence.com/threat-intel/vulnerabilities/id/b5b24f80-d3a4-452b-bc83-3576bdc62829 https://nvd.nist.gov/vuln/detail/CVE-2014-6243

Related records

Same weakness class

Other vulnerabilities in EWWW Image Optimizer

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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