Description

Horde IMP through 6.2.27, as used with Horde Application Framework through 5.2.23, allows XSS that leads to account takeover via a crafted text/html e-mail message with an onerror attribute (that may use base64-encoded JavaScript code), as exploited in the wild in March 2025.

Known Exploited

🚨 Marked as known exploited on March 21st, 2025 (29 days ago).

Classification

CVE ID: CVE-2025-30349

CVSS Base Severity: HIGH

CVSS Base Score: 7.2

CVSS Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:N

Affected Products

Vendor: Horde

Product: IMP

Exploit Prediction Scoring System (EPSS)

EPSS Score: 2.46% (probability of being exploited)

EPSS Percentile: 84.3% (scored less or equal to compared to others)

EPSS Date: 2025-04-18 (when was this score calculated)

Stakeholder-Specific Vulnerability Categorization (SSVC)

SSVC Exploitation: none

SSVC Technical Impact: partial

SSVC Automatable: true

References

https://nvd.nist.gov/vuln/detail/CVE-2025-30349
https://github.com/horde/webmail/releases/tag/v5.2.22
https://www.horde.org/apps/imp
https://lists.horde.org/archives/imp/Week-of-Mon-20250317/057781.html
https://web.archive.org/web/20250321152616/https://lists.horde.org/archives/imp/Week-of-Mon-20250317/057781.html
https://www.horde.org/download/horde
https://github.com/horde/imp/blob/fd9212ca3b72ff834504af4886f7d95138619bd4/doc/INSTALL.rst?plain=1#L61-L62
https://www.horde.org/apps/horde
https://github.com/horde/imp/blob/fd9212ca3b72ff834504af4886f7d95138619bd4/doc/INSTALL.rst?plain=1#L23-L25
https://lists.horde.org/archives/imp/Week-of-Mon-20250317/057784.html
https://github.com/horde/imp/releases/tag/v6.2.27
https://github.com/horde/base/releases/tag/v5.2.23
https://web.archive.org/web/20250321162434/https://lists.horde.org/archives/imp/Week-of-Mon-20250317/057784.html

Timeline