CVE-2025-53504Network attack vector

Authenticated script execution in users' browsers

Published Aug 21, 2025 · Updated Aug 21, 2025

Cross-site scripting in Intermesh BV GroupOffice before 6.8.119 and before 25.0.20 allows remote authenticated users to execute scripts. Neither Intermesh BV nor JPCERT/CC has published the affected component, input vector, or missing output-encoding operation. A low-privileged account and user interaction are required, and successful exploitation runs script in the affected user's browser context.

CVSS severity4.8
Medium
EPSS probability0.19%
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 Intermesh BV GroupOffice before 6.8.119 and before 25.0.20 allows remote authenticated users to execute scripts. Neither Intermesh BV nor JPCERT/CC has published the affected component, input vector, or missing output-encoding operation. A low-privileged account and user interaction are required, and successful exploitation runs script in the affected user's browser context.

The record

CVE
CVE-2025-53504
Published
Aug 21, 2025
Updated
Aug 21, 2025
Vendor
Intermesh BV
Product
GroupOffice
Classifications
CWE-79, T1203
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Aug 21, 2025CVE publishedPublication date reported by the CVE source.
  2. Aug 21, 2025Record 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=prior to 25.0.20
  2. Affected versionversion=prior to 6.8.119

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Intermesh BV · GroupOfficeversion=prior to 25.0.20; version=prior to 6.8.119

Published CVSS scores

5.4JPCERT/CCCVSS:3.0/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N
4.8JPCERT/CCCVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:A/VC:N/VI:N/VA:N/SC:L/SI:L/SA: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
Privilegesauthenticated
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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