CVE-2025-46703Network attack vector

Authenticated XSS via unescaped AtMentions output

Published Sep 19, 2025 · Updated Sep 19, 2025

Cross-site scripting in BlueSpice 5 through 5.1.1 allows remote authenticated users to execute JavaScript in other users' browsers. The AtMentions extension renders attacker-controlled mention output without the encoding needed to keep it out of executable page context. A logged-in account and another user's exposure to the crafted output are required; successful exploitation enables session hijacking and actions within that user's browser session.

CVSS severity6.4
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 BlueSpice 5 through 5.1.1 allows remote authenticated users to execute JavaScript in other users' browsers. The AtMentions extension renders attacker-controlled mention output without the encoding needed to keep it out of executable page context. A logged-in account and another user's exposure to the crafted output are required; successful exploitation enables session hijacking and actions within that user's browser session.

The record

CVE
CVE-2025-46703
Published
Sep 19, 2025
Updated
Sep 19, 2025
Vendor
Hallo Welt! GmbH
Product
BlueSpice
Classifications
CWE-79, CWE-116, CAPEC-63, T1059.007
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Sep 19, 2025CVE publishedPublication date reported by the CVE source.
  2. Sep 19, 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=5 <=5.1.1

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Hallo Welt! GmbH · BlueSpiceversion=5 <=5.1.1

Published CVSS scores

6.4NIST NVDCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N
5.9Hallo Welt! GmbHCVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:P/VC:H/VI:L/VA:N/SC:N/SI:N/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')
CWE-116Improper Encoding or Escaping of Output
CAPEC-63Cross-Site Scripting (XSS)
T1059.007Command and Scripting Interpreter: JavaScript/JScript

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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