CVE-2025-46703: Hallo Welt! BlueSpice · Improper Encoding or Escaping of Output
Affects Hallo Welt! BlueSpiceSource CVE Database V5
Not known to be exploited · CVSS 5.9 Medium.
Data as of 26 Oct 2026, 06:26 UTC
- EPSS
- 0.1% chance of exploitation in 30 days – higher than 9% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:P/VC:H/VI:L/VA:N/SC:N/SI:N/SA:NExploitation evidence
Disclosed: evidence found.
CVE published 19 Sep 2025
Detectable: no evidence on record.
No public nuclei template indexed
Weaponised: no evidence on record.
No public exploit code indexed in Metasploit or Exploit-DB
Exploited in the wildExploited: no evidence on record.
Not in CISA KEV and no source reports exploitation
Observed by OffSeq MirageSeen by Mirage: no evidence on record.
No attack traffic recorded by OffSeq Mirage sensors
A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 2026-10-26.
What to do
Affected software
| Product | Affected | Fixed in |
|---|---|---|
| Hallo Welt! GmbH BlueSpice | Affected
| Fixed in– |
AI-suggested
Organizations should prioritize updating BlueSpice to versions beyond 5.1.1 once patches become available from Hallo Welt! GmbH. In the interim, administrators can implement strict Content Security Policies (CSP) to restrict script execution and reduce XSS impact. Input sanitization and output encoding should be reviewed and enhanced, particularly for user-generated content in the AtMentions extension. Employing web application firewalls (WAFs) with rules targeting XSS patterns can provide additional protection. User education to recognize suspicious links or content and limiting privileges to the minimum necessary can reduce exploitation likelihood. Regular security audits and penetration testing focused on web application vulnerabilities will help identify residual risks. Monitoring logs for unusual activity related to BlueSpice usage can aid in early detection of exploitation attempts.
Description
Improper Encoding or Escaping of Output vulnerability in Hallo Welt! GmbH BlueSpice (Extension:AtMentions) allows Cross-Site Scripting (XSS). This issue affects BlueSpice: from 5 through 5.1.1.