CVE-2020-11611

Name: CVE-2020-11611
Creator: NVD / NIST
Published: 2020-04-07T18:15:13.633+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

MEDIUMCVSS 6.1/10EPSS 0.94%

Last modified Jun 17, 2026

CVE-2020-11611 is a medium-severity vulnerability rated 6.1/10 on the CVSS scale. An issue was discovered in xdLocalStorage through 2.0.5. The buildMessage() function in xdLocalStorage.js specifies the wildcard (*) as the targetOrigin when calling the postMessage() function on the iframe object. EPSS estimates a 0.94% chance of exploitation in the next 30 days.

Description

An issue was discovered in xdLocalStorage through 2.0.5. The buildMessage() function in xdLocalStorage.js specifies the wildcard (*) as the targetOrigin when calling the postMessage() function on the iframe object. Therefore any domain that is currently loaded within the iframe can receive the messages that the client sends.

Metrics

CVSS 3.1

6.1/10

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

EPSS Probability

0.94%

56.3th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-601

Affected Software

Vendor	Product	Versions
Cross Domain Local Storage Project	Cross Domain Local Storage	<= 2.0.5

References

https://github.com/ofirdagan/cross-domain-local-storageProduct, Third Party Advisory
https://grimhacker.com/exploiting-xdlocalstorage-localstorage-and-postmessage/#Missing-TargetOrigin-ClientExploit, Third Party Advisory
https://github.com/ofirdagan/cross-domain-local-storageProduct, Third Party Advisory
https://grimhacker.com/exploiting-xdlocalstorage-localstorage-and-postmessage/#Missing-TargetOrigin-ClientExploit, Third Party Advisory

Timeline

Published: Apr 7, 2020
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2020-11611?

How severe is CVE-2020-11611?

CVE-2020-11611 has a CVSS score of 6.1/10 (MEDIUM severity). The EPSS model estimates a 0.94% probability of exploitation in the next 30 days.

How do I fix CVE-2020-11611?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2020-11611?

Run a free Strix scan to check your systems for this vulnerability.

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Source: NVD / NIST