CVE-2013-2698

Calendar <= 1.3.2 - Cross-Site Request Forgery

2014-08-01 00:00

Strategic Overview

Status: Patched in 1.3.3
Affected Plugin: Calendar
Affected Version: <= 1.3.2
CVSS: 4.3Medium
Weakness type: CWE-352 · Cross-Site Request Forgery (CSRF)
CVE: CVE-2013-2698

At a glance

CVE-2013-2698 is a medium-severity Cross-Site Request Forgery (CSRF) vulnerability in the Calendar WordPress plugin, affecting versions <= 1.3.2. It carries a CVSS score of 4.3 (reachable over the network; low attack complexity). Exploitation requires no authentication. The issue is fixed in version 1.3.3; sites on affected versions should update now. Disclosed August 2014, reported by Charlie Eriksen.

Vulnerability Overview

Cross-site request forgery (CSRF) vulnerability in the Calendar plugin before 1.3.3 for WordPress allows remote attackers to hijack the authentication of users for requests that add a calendar entry 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-352: Cross-Site Request Forgery (CSRF)

Reaching this weakness in Calendar <= 1.3.2 takes a caller who can reach the endpoint. Cross-site request forgery abuses the fact that browsers attach a victim's cookies to any request, so a state-changing action that only checks who you are, not whether you meant to act, can be triggered from another site.

An attacker who gets a logged-in user to load a crafted page can perform that action as them, with the impact scaling to whatever the victim's role is allowed to do. For Calendar the fix is 1.3.3: builds <= 1.3.2 are affected, anything from 1.3.3 onward is not.

Remediation

Update to version 1.3.3, or a newer patched version

How does WordSec protect against this?

The attempt arrives as an ordinary request to Calendar: WordSec's web application firewall inspects request payloads before WordPress loads them. None of that substitutes for the fix: Calendar 1.3.3 closes this, and updating the plugin is the step that ends it.

Firewall
Alerts

External References

https://www.cve.org/CVERecord?id=CVE-2013-2698 https://www.wordfence.com/threat-intel/vulnerabilities/id/fe996511-f29a-4e28-b6de-3633d45b10c1 https://nvd.nist.gov/vuln/detail/CVE-2013-2698

Related records

Other vulnerabilities in Calendar

CVSS Vector

4.3

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

Base

Attack VectorNetwork
Attack ComplexityLow
Privileges RequiredNone
User InteractionRequired
ScopeUnchanged
ConfidentialityNone
IntegrityLow
AvailabilityNone

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