CVE-2023-51517

Calculated Fields Form <= 1.2.28 - Authenticated (Contributor+) Open Redirect via Shortcode

2023-12-27 00:00
Ngô Thiên An (ancorn_)

Strategic Overview

Status
Patched in 1.2.29
Affected Plugin
Calculated Fields Form – AI Form Builder for WordPress – Contact, Payment, Quote, Quiz & More
Affected Version
<= 1.2.28
CVSS
4.3Medium
Weakness type
CWE-601 · URL Redirection to Untrusted Site ('Open Redirect')
CVE
CVE-2023-51517
View all Calculated Fields Form – AI Form Builder for WordPress – Contact, Payment, Quote, Quiz & More vulnerabilities

At a glance

CVE-2023-51517 is a medium-severity URL Redirection to Untrusted Site ('Open Redirect') vulnerability in the Calculated Fields Form WordPress plugin, affecting versions <= 1.2.28. It carries a CVSS score of 4.3 (reachable over the network; low attack complexity). Exploitation requires an authenticated account at Contributor level or above. The issue is fixed in version 1.2.29; sites on affected versions should update now. Disclosed December 2023, reported by Ngô Thiên An (ancorn_).

Vulnerability Overview

The Calculated Fields Form plugin for WordPress is vulnerable to Open Redirect via the plugin's shortcode(s) in all versions up to 1.2.29 (exclusive) due to insufficient input sanitization and output escaping on user supplied attributes. This makes it possible for authenticated attackers with contributor-level and above permissions to redirect users when they visit an injected page.

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-601: URL Redirection to Untrusted Site ('Open Redirect')

Reaching this weakness in Calculated Fields Form <= 1.2.28 takes an account at Contributor level or above. An open redirect is a page that takes a destination from the request and sends the browser there without checking that the destination belongs to the site.

A link that starts on a trusted domain finishes on an attacker's, which is what makes phishing and consent-screen abuse credible to the person clicking it. For Calculated Fields Form the fix is 1.2.29: builds <= 1.2.28 are affected, anything from 1.2.29 onward is not.

Remediation

Update to version 1.2.29, or a newer patched version

How does WordSec protect against this?

An attacker needs Contributor access first, so the firewall sees the attempt as traffic from a logged-in account: WordSec's web application firewall inspects request payloads before WordPress loads them. None of that substitutes for the fix: Calculated Fields Form 1.2.29 closes this, and updating the plugin is the step that ends it.

  • Firewall
  • Alerts

External References

https://www.cve.org/CVERecord?id=CVE-2023-51517https://www.wordfence.com/threat-intel/vulnerabilities/id/85555a8f-5d23-458d-9166-d30f8f0551e0https://nvd.nist.gov/vuln/detail/CVE-2023-51517

Related records

Vulnerability data © Defiant, Inc., provided under the Wordfence Intelligence T&C