TI-2025-27418 Aliases CVE-2025-41066 GHSA-j5gg-5w34-g43r

Disclosure of sensitive information in Horde Groupware

LOW 30CWE-200Published 2025-12-02 · Updated 2025-12-02

Key facts

Attack vector: Network
Privileges required: None
User interaction: None
Attack complexity: Low
Attack requirements: None
Impact type: Information disclosure
Confidentiality · integrity · availability: Low · None · None
Fix status: No fix listed

Attack profile from CVSS 4.0 · CNA. Fix status from CNA. Impact type from CWE-200.

Summary

Horde Groupware v5.2.22 has a user enumeration vulnerability that allows an unauthenticated attacker to determine the existence of valid accounts on the system. To exploit the vulnerability, an HTTP request must be sent to ‘/imp/attachment.php’ including the parameters ‘id’ and ‘u’. If the specified user exists, the server will return the download of an empty file; if it does not exist, no download will be initiated, which unequivocally reveals the validity of the user.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV

EPSS 0.00263 18th percentileScored 2026-11-07

Fix No fix listed No fixed version in the sources yet

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation: None
Automatable: No
Technical impact: Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

Vendor	Product	Affected versions	Fixed in	Status	Source
Horde	Groupware	5.2.22	—	No fix listed	CNA

Groupware VendorHorde Affected 5.2.22 Fixed in — No fix listed CNA

CPE configurations NVD · 1

CPE	Versions	Role	Vendor
cpe:2.3:a:horde:groupware:5.2.22::::-:::	5.2.22	Vulnerable	Horde

cpe:2.3:a:horde:groupware:5.2.22:*:*:*:-:*:*:* Versions 5.2.22 Vulnerable ·Horde

Remediation

No fixed version listed by the sources yet.

Timeline

2026-10-02 Threatist record created from CVE-2025-41066
2026-10-03 Alias added: GHSA-j5gg-5w34-g43r

References

Advisory 1

https://www.incibe.es/en/incibe-cert/notices/aviso/disclosure-sensitive-information-horde-groupware

TI-2020-06837 Horde Groupware Webmail Edition 5.2.22 allows injection of arbitrary PHP code via CSV… CVSS 3.1CRITICAL 9.8
TI-2022-12524 Horde Groupware Webmail Edition through 5.2.22 allows a reflection injection attack… CVSS 3.1HIGH 8.0
TI-2012-00202 Horde 3.3.12, Horde Groupware 1.2.10, and Horde Groupware Webmail Edition 1.2.10, as… CVSS 2.0HIGH 7.5
TI-2017-05066 In Horde_Crypt before 2.7.6, as used in Horde Groupware Webmail Edition through 5.2.17… CVSS 3.0HIGH 8.8
TI-2019-07239 Remote code execution was discovered in Horde Groupware Webmail 5.2.22 and 5.2.17. CVSS 3.1HIGH 8.8
TI-2008-06907 Horde Kronolith H3 2.1 before 2.1.7 and 2.2 before 2.2-RC2; Nag H3 2.1 before 2.1.4 and… CVSS 2.0HIGH 10.0

See all 45 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences