CVE-2026-57733 in Cloud Library Plugin
Summary
by MITRE • 07/13/2026
Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') vulnerability in tagDiv tagDiv Cloud Library td-cloud-library allows DOM-Based XSS.This issue affects tagDiv Cloud Library: from n/a through <= 3.9.4.
Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.
Analysis
by VulDB Data Team • 07/13/2026
This cross-site scripting vulnerability resides within the tagDiv Cloud Library td-cloud-library component and represents a classic dom-based xss flaw that exploits improper input sanitization during web page generation processes. The vulnerability specifically manifests when user-supplied data is not adequately neutralized before being incorporated into dynamically generated html content, creating opportunities for malicious script execution within the victim's browser context.
The technical implementation of this flaw involves the library's handling of client-side parameters that are directly reflected in dom elements without proper sanitization or encoding mechanisms. When malicious input is processed through the td-cloud-library components, it can be injected into javascript contexts where it executes with the privileges and permissions of the affected user. This type of vulnerability falls under CWE-79 which specifically addresses improper neutralization of input during web page generation, and more precisely aligns with CWE-749 which covers dangerous methods or functions used in web applications.
The operational impact of this vulnerability extends beyond simple data theft or defacement scenarios as it can enable attackers to establish persistent malicious presence within affected websites. An attacker could leverage this flaw to steal user session cookies, perform unauthorized actions on behalf of victims, redirect users to malicious sites, or even deploy additional malware through the compromised browser context. The dom-based nature means that the attack vector does not require server-side processing, making it particularly dangerous as it can be delivered through simple url parameters or other client-side input mechanisms.
From an att&ck framework perspective, this vulnerability maps to techniques such as t1059.007 for command and scripting interpreter javascript and t1566 for phishing with malicious attachments or links. The attack chain typically involves initial reconnaissance to identify affected systems, crafting malicious payloads that exploit the input handling flaw, and delivering these payloads through social engineering or direct exploitation of vulnerable web pages. The vulnerability affects all versions from the baseline through version 3.9.4, indicating this represents a long-standing issue that has not been properly addressed in the library's input processing mechanisms.
Mitigation strategies should include immediate implementation of proper input sanitization routines that encode special characters and validate all user-supplied data before it is processed by the td-cloud-library components. Organizations should deploy content security policies to limit script execution contexts and implement proper output encoding for any dynamic content generation. Additionally, regular security assessments should be conducted to identify similar vulnerabilities in third-party libraries and plugins that may be present in web applications. The recommended approach involves upgrading to patched versions of the library where available or implementing defensive programming practices such as using secure coding standards like owasp top ten guidelines for javascript input validation and sanitization techniques.