CVE-2020-9334

Envira Photo Gallery <= 1.7.6 - Authenticated Stored Cross-Site Scripting

2020-02-25 00:00

Strategic Overview

Status: Patched in 1.7.7
Affected Plugin: Envira Gallery – Image Photo Gallery, Albums, Video Gallery, Slideshows & More
Affected Version: < 1.7.7
CVSS: 6.4Medium
Weakness type: CWE-79 · Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
CVE: CVE-2020-9334

View all Envira Gallery – Image Photo Gallery, Albums, Video Gallery, Slideshows & More vulnerabilities

At a glance

CVE-2020-9334 is a medium-severity Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') vulnerability in the Envira Gallery WordPress plugin, affecting versions < 1.7.7. It carries a CVSS score of 6.4 (reachable over the network; low attack complexity). Exploitation requires an authenticated account. The issue is fixed in version 1.7.7; sites on affected versions should update now. Disclosed February 2020, reported by Vishnupriya Ilango.

Vulnerability Overview

A stored XSS vulnerability exists in the Envira Photo Gallery plugin through 1.7.6 for WordPress. Successful exploitation of this vulnerability would allow a authenticated low-privileged user to inject arbitrary JavaScript code that is viewed by other users.

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 interaction from a victim user.

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

Reaching this weakness in Envira Gallery < 1.7.7 takes any authenticated account. 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 Envira Gallery the fix is 1.7.7: builds < 1.7.7 are affected, anything from 1.7.7 onward is not.

Remediation

Update to version 1.7.7, or a newer patched version

How does WordSec protect against this?

The attempt arrives as an ordinary request to Envira Gallery: WordSec's web application firewall inspects request payloads before WordPress loads them. None of that substitutes for the fix: Envira Gallery 1.7.7 closes this, and updating the plugin is the step that ends it.

Firewall
Alerts

External References

https://www.cve.org/CVERecord?id=CVE-2020-9334 https://www.wordfence.com/threat-intel/vulnerabilities/id/f05b82c3-bb29-494e-a020-427cb1a816a0 https://nvd.nist.gov/vuln/detail/CVE-2020-9334

Related records

Same weakness class

Other vulnerabilities in Envira Gallery – Image Photo Gallery, Albums, Video Gallery, Slideshows & More

CVSS Vector

6.4

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

Base

Attack VectorNetwork
Attack ComplexityLow
Privileges RequiredLow
User InteractionNone
ScopeChanged
ConfidentialityLow
IntegrityLow
AvailabilityNone

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