Vulnerability library
Security checkJune 02, 2026

Bootstrap Vulnerable to Cross-Site Scripting - bootstrap

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Medium severitynpmbootstrap

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Description

Versions of bootstrap prior to 3.4.1 for 3.x and 4.3.1 for 4.x are vulnerable to Cross-Site Scripting (XSS). The data-template attribute of the tooltip and popover plugins lacks input sanitization and may allow attacker to execute arbitrary JavaScript.

Recommendation

Update the bootstrap package to the latest compatible version. Followings are version details:

  • Affected version(s): **>= 3.0.0, < 3.4.1 >= 4.0.0, < 4.3.1**
  • Patched version(s): **3.4.1 4.3.1**

References

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See something that needs correcting? Let us knowUpdated June 02, 2026