CVE-2018-18019

Slideshow Gallery <= 1.6.8 - Cross-Site Scripting

2018-10-04 00:00

Strategic Overview

Status: Patched in 1.6.9
Affected Plugin: Slideshow Gallery LITE
Affected Version: <= 1.6.8
CVSS: 6.1Medium
Weakness type: CWE-79 · Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
CVE: CVE-2018-18019

View all Slideshow Gallery LITE vulnerabilities

At a glance

CVE-2018-18019 is a medium-severity Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') vulnerability in the Slideshow Gallery LITE WordPress plugin, affecting versions <= 1.6.8. 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 1.6.9; sites on affected versions should update now. Disclosed October 2018, reported by Mohammed Ansari.

Vulnerability Overview

XSS exists in the Tribulant Slideshow Gallery plugin 1.6.8 for WordPress via the wp-admin/admin.php?page=slideshow-slides&method=save Slide[title], Slide[media_file], or Slide[image_url] parameter.

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 Slideshow Gallery LITE <= 1.6.8 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 Slideshow Gallery LITE the fix is 1.6.9: builds <= 1.6.8 are affected, anything from 1.6.9 onward is not.

Remediation

Update to version 1.6.9, or a newer patched version

How does WordSec protect against this?

The attempt arrives as an ordinary request to Slideshow Gallery LITE: WordSec's web application firewall inspects request payloads before WordPress loads them. None of that substitutes for the fix: Slideshow Gallery LITE 1.6.9 closes this, and updating the plugin is the step that ends it.

Firewall
Alerts

External References

https://www.cve.org/CVERecord?id=CVE-2018-18019 https://www.wordfence.com/threat-intel/vulnerabilities/id/50c33c8d-4488-4f9e-bc58-21cb8cd679e6 https://nvd.nist.gov/vuln/detail/CVE-2018-18019

Related records

Same weakness class

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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