CVE-2021-33492Public exploitNetwork attack vector

Stored XSS via unsanitized chat room names

Published Nov 22, 2021 · Updated Aug 3, 2024

Stored cross-site scripting in OX App Suite 7.10.5 allows attackers to execute JavaScript in another chat participant's browser via a room name. OX Chat accepts JavaScript fragments as room names and inserts those names into other participants' DOMs without sufficient sanitization. An attacker must share the victim's OX context and invite the victim to the crafted room; execution can hijack the victim's session or trigger unwanted interface actions.

CVSS severity5.3
Medium
EPSS probability1.15%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Stored cross-site scripting in OX App Suite 7.10.5 allows attackers to execute JavaScript in another chat participant's browser via a room name. OX Chat accepts JavaScript fragments as room names and inserts those names into other participants' DOMs without sufficient sanitization. An attacker must share the victim's OX context and invite the victim to the crafted room; execution can hijack the victim's session or trigger unwanted interface actions.

The record

CVE
CVE-2021-33492
Published
Nov 22, 2021
Updated
Aug 3, 2024
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-80, T1059.007
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Nov 22, 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 privilegesunauthenticated

What is affected?

Affected products and versions are unavailable in this record.

Published CVSS scores

5.3Open-Xchange GmbHCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/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 exploitPublished

Weakness, pattern, technique

CWE-80Improper Neutralization of Script-Related HTML Tags in a Web Page (Basic XSS)
T1059.007Command and Scripting Interpreter: JavaScript/JScript

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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