Open Redirect in xdLocalStorage

published 2020-04-07 6y ago modified 2026-06-17 4mo 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.

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Exploit prediction

0.94% chance of exploitation in the next 30 days, higher than 61% of all scored CVEs (FIRST EPSS, 2026-11-09).

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 Intel 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.