CVE-2015-9544Public exploitNetwork attack vector

Local storage disclosure and tampering via unchecked origin

Published Apr 7, 2020 · Updated Aug 6, 2024

Improper input validation in xdLocalStorage through 2.0.5 allows remote attackers to read or alter local storage via malicious web messages. The receiveMessage() function in xdLocalStoragePostMessageApi.js parses JSON postMessage requests and performs set, get, remove, key, size, length, and clear actions without validating message origin. Exploitation requires enticing a user to load a malicious site that can interact with the vulnerable magic iframe, allowing confidentiality and integrity impact without service interruption.

CVSS severity7.1
High
EPSS probability1.33%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Improper input validation in xdLocalStorage through 2.0.5 allows remote attackers to read or alter local storage via malicious web messages. The receiveMessage() function in xdLocalStoragePostMessageApi.js parses JSON postMessage requests and performs set, get, remove, key, size, length, and clear actions without validating message origin. Exploitation requires enticing a user to load a malicious site that can interact with the vulnerable magic iframe, allowing confidentiality and integrity impact without service interruption.

The record

CVE
CVE-2015-9544
Published
Apr 7, 2020
Updated
Aug 6, 2024
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-20, T1189
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Apr 7, 2020CVE publishedPublication date reported by the CVE source.
  2. Aug 6, 2024Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Affected buildAffected product and version details are unavailable.

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Affected products and versions are unavailable in this record.

Published CVSS scores

5.8NVDAV:N/AC:M/Au:N/C:P/I:P/A:N
7.1NVDCVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-20Improper Input Validation
T1189Drive-by Compromise

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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