CVE-2023-48679Network attack vector

Browser data exposure via unchecked postMessage origin

Published Feb 27, 2024 · Updated Aug 2, 2024

Stored XSS in Acronis Cyber Protect 16 before build 37391 allows remote attackers to expose browser-accessible data via postMessage. The web interface accepts cross-window postMessage data without validating the sender's origin, allowing untrusted content to persist and execute in a user's browser. Exploitation requires user interaction; the published impact is limited to confidentiality, and Acronis has not disclosed the affected handler or storage path.

CVSS severity3.1
Low
EPSS probability0.26%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Stored XSS in Acronis Cyber Protect 16 before build 37391 allows remote attackers to expose browser-accessible data via postMessage. The web interface accepts cross-window postMessage data without validating the sender's origin, allowing untrusted content to persist and execute in a user's browser. Exploitation requires user interaction; the published impact is limited to confidentiality, and Acronis has not disclosed the affected handler or storage path.

The record

CVE
CVE-2023-48679
Published
Feb 27, 2024
Updated
Aug 2, 2024
Vendor
Acronis
Product
Acronis Cyber Protect
Classifications
CWE-79, T1203
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Feb 27, 2024CVE publishedPublication date reported by the CVE source.
  2. Aug 2, 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?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=unspecified <37391

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Acronis · Acronis Cyber Protectversion=unspecified <37391

Published CVSS scores

3.1Acronis International GmbHCVSS:3.0/AV:N/AC:H/PR:N/UI:R/S:U/C:L/I:N/A:N
5.4NIST National Vulnerability DatabaseCVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/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 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-79Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
T1203Exploitation for Client Execution

Public exploit references

No public exploit references are available in this record.

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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