CVE-2025-26557 HIGH

CVE-2025-26557: WordPress ViperBar Plugin <= 2.0 - Reflected Cross Site Scripting (XSS) vulnerability

Vendor Viperchill

Product ViperBar

Weakness CWE-79 · XSS

Published March 3, 2025

Last update April 28, 2026

View on NVD All CVEs

CVSS base score

7.1/10

Attack vector Network

Attack complexity Low

Privileges required None

User interaction Required

Confidentiality Low

Integrity Low

CVSS vector

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

What the vulnerability does

01Description

Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') vulnerability in viperchill ViperBar viperbar allows Reflected XSS.This issue affects ViperBar: from n/a through <= 2.0.

Explanation of Vulnerability in Simple Terms

02Summary

ViperBar versions 2.0 and earlier contain a cross-site scripting (XSS) vulnerability that allows attackers to inject malicious scripts into web pages. The vulnerability requires user interaction—victims must visit a crafted link or page. When exploited, the injected code can affect other users and potentially compromise site functionality or steal sensitive data.

What an attacker can do

03Attacker Capabilities

Inject malicious JavaScript that runs in visitors' browsers and affects other users on the site.

Potential impact on your site

04Site Impact

Visitors could be redirected, have data stolen, or see defaced content. Site reputation and user trust may be damaged.

Conditions required to exploit

05Prerequisites

No authentication required. Victim must click a malicious link or visit an attacker-controlled page.

Key dates

06Disclosure timeline

March 3, 2025 CVE published

April 28, 2026 Record updated

External resources

07References

NVD — National Vulnerability Database https://nvd.nist.gov/vuln/detail/CVE-2025-26557 CWE — Common Weakness Enumeration https://cwe.mitre.org/data/definitions/79.html AskarLabs — CWE-79 write-up Cross-Site Scripting

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