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CVE Record

CVE-2015-9544: An issue was discovered in xdLocalStorage through 2.0.5.

An issue was discovered in xdLocalStorage through 2.0.5. The receiveMessage() function in xdLocalStoragePostMessageApi.js does not implement any validation of the origin of web messages. Remote attackers who can entice a user to load a malicious site can exploit this issue to impact the confidentiality and integrity of data in the local storage of the vulnerable site via malicious web messages.

UnknownCVSS not scoredNot KEV-listedUpdated
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Glexia's TakeAutomated analysismoderate

Security readout for executives and security teams

Plain-English summary

This flaw affects sites using xdLocalStorage through 2.0.5. It fails to check where browser messages come from, so a malicious site could trick a user into sending messages that read or change local-storage data for the vulnerable site. Business impact depends on what the site stores there.

Executive priority

Prioritize if customer-facing sites or portals use this library and store sensitive browser-side data. User interaction is required and active exploitation is not evidenced here, so urgency should be risk-based rather than emergency-driven.

Technical view

receiveMessage() in xdLocalStoragePostMessageApi.js lacks postMessage origin validation. A remote attacker who entices a user to load a malicious site can send malicious web messages affecting confidentiality and integrity of the vulnerable site's local storage. No CVSS or CWE is provided in the source bundle.

Likely exposure

Likely exposure is web applications that include xdLocalStorage through 2.0.5 or the referenced cross-domain-local-storage project. Risk is higher where localStorage holds tokens, user data, preferences, or security-relevant state. The bundle does not identify specific vendors, deployments, or package inventories.

Exploitation context

The bundle describes remote exploitation requiring a user to load a malicious site. It does not cite CISA KEV listing, active exploitation, public weaponization status, or observed attacks. Treat exploitation as plausible but not confirmed in the wild.

Researcher notes

Evidence is limited to the CVE description and referenced project issue, pull request, repository, and analysis article. The affected version is stated as xdLocalStorage through 2.0.5, but the bundle lacks CVSS, CWE, vendor advisory details, and confirmed fixed release information.

Mitigation direction

  • Inventory sites and front-end bundles for xdLocalStorage or cross-domain-local-storage usage.
  • Check vendor or project guidance for a corrected version or supported replacement.
  • Avoid storing sensitive tokens or secrets in localStorage where feasible.
  • Require strict origin validation for any postMessage receiver handling storage operations.

Validation and detection

  • Review bundled JavaScript for xdLocalStoragePostMessageApi.js and receiveMessage().
  • Confirm message handlers validate event.origin against an explicit trusted allowlist.
  • Identify what data the affected site stores in localStorage.
  • Verify remediation in a browser test without using offensive payloads.
Prepared
Confidence
medium
Sources
6

Public sources used

Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.

Potential ATT&CK relevance

Conservative CVE-to-ATT&CK context

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Vulnerability profileCVE Program record
Severity
Unknown
CVSS
Not scored
Known Exploited
No
Published
Official CVE source material

CNA and ADP enrichment extracted from CVE v5

These fields come from the CVE record and ADP containers, not from Glexia's Take. They preserve time-varying source decisions such as CISA SSVC, KEV status, CVSS metrics, and provider references.

0CVSS vectors
0Timeline events
0ADP providers
5Source links

CVSS and timeline data

No CVSS vectors or timeline events were available in the normalized CVE source material.

Source materials

Affected products

Products and packages named in the record

VendorProductVersion / packageStatus
n/an/an/aListed
Weakness

CWE details

No CWE listed

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