Prototype Pollution in Strikingly

CVE-2023-2582

A prototype pollution vulnerability exists in Strikingly CMS which can result in reflected cross-site scripting (XSS) in affected applications and sites built with Strikingly. The vulnerability exists because of Strikingly JavaScript library parsing the URL fragment allows access to the __proto__ or constructor properties and the Object prototype. By leveraging an embedded gadget like jQuery, an attacker who convinces a victim to visit a specially crafted link could achieve arbitrary javascript execution in the context of the user's browser.

Vulnerability class: Prototype Pollution

EPSS: 0.006 (45.1th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 6.1 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N.

Affected products

  • Strikingly
  • N/a Strikingly — versions All versions

Weakness classification (CWE)

References

Frequently asked questions

What is CVE-2023-2582?
CVE-2023-2582 is a medium-severity vulnerability in Strikingly, classified under Improperly Controlled Modification of Object Prototype Attributes (Prototype Pollution). CVSS score: 6.1/10. Published 2023-05-08.
How severe is CVE-2023-2582?
Medium severity. CVSS v3 base score is 6.1 out of 10.