CVE-2025-2580

Contact Form by Bit Form <= 2.18.3 - Authenticated (Author+) Stored Cross-Site Scripting via SVG File Upload

2025-04-24 16:58
Avraham Shemesh

Strategic Overview

Status
Patched in 2.18.4
Affected Plugin
Bit Form – Contact Form, Payment Forms, Multi Step Forms, Calculator & Custom Form Builder
Affected Version
<= 2.18.3
CVSS
4.9Medium
Weakness type
CWE-79 · Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
CVE
CVE-2025-2580
View all Bit Form – Contact Form, Payment Forms, Multi Step Forms, Calculator & Custom Form Builder vulnerabilities

At a glance

CVE-2025-2580 is a medium-severity Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') vulnerability in the Bit Form WordPress plugin, affecting versions <= 2.18.3. It carries a CVSS score of 4.9 (reachable over the network). Exploitation requires an authenticated account at Author level or above. The issue is fixed in version 2.18.4; sites on affected versions should update now. Disclosed April 2025, reported by Avraham Shemesh.

Vulnerability Overview

The Contact Form by Bit Form plugin for WordPress is vulnerable to Stored Cross-Site Scripting via SVG File uploads in all versions up to, and including, 2.18.3 due to insufficient input sanitization and output escaping. This makes it possible for authenticated attackers, with Author-level access and above, to inject arbitrary web scripts in pages that will execute whenever a user accesses the SVG file.

Technical Analysis

The vector marks this flaw as remotely reachable over the network, and no interaction from a victim user.

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

Reaching this weakness in Bit Form <= 2.18.3 takes an account at Author level or above. 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 Bit Form the fix is 2.18.4: builds <= 2.18.3 are affected, anything from 2.18.4 onward is not.

Remediation

Update to version 2.18.4, or a newer patched version

How does WordSec protect against this?

An attacker needs Author 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: Bit Form 2.18.4 closes this, and updating the plugin is the step that ends it.

  • Firewall
  • Alerts

External References

https://www.cve.org/CVERecord?id=CVE-2025-2580https://www.wordfence.com/threat-intel/vulnerabilities/id/1f3b5d85-a8b0-43ac-b593-a61e20b9a4cahttps://nvd.nist.gov/vuln/detail/CVE-2025-2580

Related records

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