CVE-2021-23931Public exploitNetwork attack vector

Script execution via inline binary-file delivery

Published Jan 12, 2021 · Updated Aug 3, 2024

Cross-site scripting in OX App Suite 7.10.4 and earlier allows remote attackers to execute script code via an inline binary file. Shared-file delivery accepts an undocumented parameter that forces binary content to render inline, so the browser processes embedded HTML and JavaScript. A victim must follow an attacker-controlled sharing link; execution in the victim's browser context permits session data theft or unwanted web-interface actions.

CVSS severity6.1
Medium
EPSS probability1.13%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Cross-site scripting in OX App Suite 7.10.4 and earlier allows remote attackers to execute script code via an inline binary file. Shared-file delivery accepts an undocumented parameter that forces binary content to render inline, so the browser processes embedded HTML and JavaScript. A victim must follow an attacker-controlled sharing link; execution in the victim's browser context permits session data theft or unwanted web-interface actions.

The record

CVE
CVE-2021-23931
Published
Jan 12, 2021
Updated
Aug 3, 2024
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-79, CWE-80, T1059.007
Attack vector
network
Privileges
Unavailable

Timeline

How it unfolded

  1. Jan 12, 2021CVE publishedPublication date reported by the CVE source.
  2. Aug 3, 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 privilegesUnavailable in this record.

What is affected?

Affected products and versions are unavailable in this record.

Published CVSS scores

6.1NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
4.3NVDAV:N/AC:M/Au:N/C:N/I:P/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
PrivilegesUnavailable
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-79Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
CWE-80Improper Neutralization of Script-Related HTML Tags in a Web Page (Basic XSS)
T1059.007Command and Scripting Interpreter: JavaScript

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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