XSS in Horde Imp
CVE-2025-30349
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.
Vulnerability class: XSS (Cross-Site Scripting)
Published · last modified .
CVSS v3 metric
CVSS v3 base score 7.2 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:N.
EPSS exploit prediction
EPSS: 0.313 (98.3th percentile), scored .
Moderate probability of exploitation in the next 30 days — watch for active exploitation reports. 98th percentile — 98.3% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.313 · newest: 0.313 · change: 0.000
Affected products
- Horde Imp — versions 0
Weakness classification (CWE)
Public proof-of-concept exploits
References
- github.com/horde/webmail/releases/tag/v5.2.22
- www.horde.org/apps/imp
- lists.horde.org/archives/imp/Week-of-Mon-20250317/057781.html
- web.archive.org/web/20250321152616/https://lists.horde.org/archives/imp/Week-of…
- www.horde.org/download/horde
- github.com/horde/imp/blob/fd9212ca3b72ff834504af4886f7d95138619bd4/doc/INSTALL…
- www.horde.org/apps/horde
- github.com/horde/imp/blob/fd9212ca3b72ff834504af4886f7d95138619bd4/doc/INSTALL…
- lists.horde.org/archives/imp/Week-of-Mon-20250317/057784.html
- github.com/horde/imp/releases/tag/v6.2.27
Frequently asked questions
- What is CVE-2025-30349?
- CVE-2025-30349 is a high-severity vulnerability in Horde Imp, classified under Cross-site Scripting. CVSS score: 7.2/10. Published 2025-03-21.
- How severe is CVE-2025-30349?
- High severity. CVSS v3 base score is 7.2 out of 10.
- Is CVE-2025-30349 known to be exploited?
- 5 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.