Strategic Overview
- Status
- Patched in 5.2.2
- Affected Version
<= 5.2.0- CVSS
- 6.1Medium
- Weakness type
- CWE-79 · Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
- CVE
CVE-2018-0511
At a glance
CVE-2018-0511 is a medium-severity Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') vulnerability in the Perfect Images WordPress plugin, affecting versions <= 5.2.0. 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 5.2.2; sites on affected versions should update now. Disclosed November 2017, reported by Chris Liu.
Vulnerability Overview
Cross-site scripting vulnerability in WP Retina 2x prior to version 5.2.2 allows an attacker to inject arbitrary web script or HTML via unspecified vectors.
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 Perfect Images <= 5.2.0 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 Perfect Images the fix is 5.2.2: builds <= 5.2.0 are affected, anything from 5.2.2 onward is not.
Remediation
Update to version 5.2.2, or a newer patched version
How does WordSec protect against this?
The attempt arrives as an ordinary request to Perfect Images: WordSec's web application firewall inspects request payloads before WordPress loads them. None of that substitutes for the fix: Perfect Images 5.2.2 closes this, and updating the plugin is the step that ends it.
- Firewall
- Alerts
External References
Related records
Other vulnerabilities in Perfect Images: Regenerate Thumbnails, Image Sizes, WebP & AVIF
Vulnerability data © Defiant, Inc., provided under the Wordfence Intelligence T&C