6.9

CVE-2025-41066: horde groupware

CVSS: 6.9v4.0MediumAnalyzed
AliasesUBUNTU-CVE-2025-41066DEBIAN-CVE-2025-41066
Published 02-12-2025Last modified 02-12-2025
Open JSON

Vulnerability summary

CVE-2025-41066 is a medium (CVSS 6.9) vulnerability in horde groupware. EPSS estimates a 0.24% chance of exploitation in the next 30 days, higher than 14.7% of scored vulnerabilities.

Overall risk
28/100
0100
Medium · default modelHow is this calculated?
CVSS score
6.9/10
010
Medium · v4.0 (CVE.org)
EPSS score
0.24%
0%100%
Low · 0.00 pp in 30 days
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded

Timeline

  1. 02-12-2025
    PublishedVulnerability first disclosed.
  2. 02-12-2025
    Last modifiedVulnerability information updated.

Description

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.

CVSS metrics

6 scores · 4 sources · 2 versions

EPSS trend

Probability

0.24%

Chance of exploitation in the next 30 days

Percentile

15%

Versus all other CVEs

30-day change

0.00 pp

From 0.24% on 19-09-2026

19-09-202619-10-2026
EPSS score
0.24%

Known exploited

Compare KEV catalogs

Not in any of the 3 tracked catalogs.

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

Affected systems

Debian1 product
  • php-horde-groupwareAll versions (No fix recorded)
Horde1 product
Ubuntu1 product
  • php-horde-groupwareAll versions (No fix recorded)

3 vendors · 3 products

References

4 links