Open Redirect in xdLocalStorage

published 2020-04-07 6 y ago modified 2026-06-17 4 mo ago also GHSA-c6c4-jmqx-3r33 , EUVD-2021-2502

cvss: 6.1; version 3.1, NVD
cisa kev: Not listed; not in CISA's catalog
epss: 0.9%; EPSS 0.9% chance of exploitation in 30 days, percentile 61%
public exploits: 0; none known

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.

Exploit prediction

0.94% chance of exploitation in the next 30 days, higher than 61% of all scored CVEs (FIRST EPSS, 2026-11-08).

Exploits and checks

grimhacker.com https://grimhacker.com/exploiting-xdlocalstorage-localstorage-and-postmessage/#Missing-TargetOrigin-Client referenced PoC, tagged "exploit" by a source, unverified

CVSS scores

assigned by	version	score	vector
NVD	3.1	6.1	CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
NVD	2.0	5.8	AV:N/AC:M/Au:N/C:P/I:P/A:N
GitHub	3.1	6.1	CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N

Affected packages

ecosystem	package	affected	fixed in
npm	xdlocalstorage	<=2.0.5	no fix listed

Classification

Weakness

CWE-601 URL Redirection to Untrusted Site

References

grimhacker.com /exploiting-xdlocalstorage-localstorage-and-postmessage/#Missing-TargetOrigin-Client
web, exploit, third-party-advisory
github.com /ofirdagan/cross-domain-local-storage
web, product, third-party-advisory
nvd.nist.gov /vuln/detail/CVE-2020-11611
advisory

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.

Summary