CVE-2017-12068

Event List <= 0.7.9 - Unauthenticated Cross-Site Scripting

2017-07-31 00:00

Strategic Overview

Status: Patched in 0.7.10
Affected Plugin: Event List
Affected Version: <= 0.7.9
CVSS: 6.1Medium
Weakness type: CWE-79 · Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
CVE: CVE-2017-12068

At a glance

CVE-2017-12068 is a medium-severity Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') vulnerability in the Event List WordPress plugin, affecting versions <= 0.7.9. 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 0.7.10; sites on affected versions should update now. Disclosed July 2017, reported by ning1022.

Vulnerability Overview

The Event List plugin 0.7.9 for WordPress has XSS in the slug array parameter to wp-admin/admin.php in an el_admin_categories delete_bulk action.

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 Event List <= 0.7.9 takes no account at all. 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 Event List the fix is 0.7.10: builds <= 0.7.9 are affected, anything from 0.7.10 onward is not.

Remediation

Update to version 0.7.10, or a newer patched version

How does WordSec protect against this?

Requests carrying this pattern arrive without a session, so nothing upstream of the firewall gets a chance to reject them: WordSec's web application firewall inspects request payloads before WordPress loads them. None of that substitutes for the fix: Event List 0.7.10 closes this, and updating the plugin is the step that ends it.

Firewall
Login Security
Alerts

External References

https://www.cve.org/CVERecord?id=CVE-2017-12068 https://www.wordfence.com/threat-intel/vulnerabilities/id/6153d71e-66c8-49d1-80d8-6a121883172d https://nvd.nist.gov/vuln/detail/CVE-2017-12068

Related records

Same weakness class

5.5CVE-2022-0418: Event List < 0.8.7 Stored Cross-Site ScriptingCVE-2022-0418

Other vulnerabilities in Event List

7.2CVE-2017-9429: Event List < 0.7.9 SQL InjectionCVE-2017-9429

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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