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CVE-2025-30349

39
FAUCET Score

CVE-2025-30349 is a high-severity cross-site scripting (XSS) vulnerability affecting Horde IMP through version 6.2.27 and Horde Application Framework through 5.2.23. This flaw allows an attacker to achieve account takeover by sending a specially crafted HTML email containing an onerror attribute with base64-encoded JavaScript. The vulnerability has a CVSS score of 7.2, indicating a high risk due to its network attack vector and low attack complexity, potentially leading to partial confidentiality and integrity compromise. Notably, this vulnerability is being actively exploited in the wild as of March 2025, despite a lack of public exploit code or Metasploit/Nuclei modules, and has garnered significant community discussion.

Impacted Technologies

VendorProductVersion(s)CPE
>= 0, <= 6.2.27CPE match
cpe:2.3:a:horde:imp:*:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

7.2HIGH

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

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
CHANGED
Confidentiality Impact
LOW
Integrity Impact
LOW
Availability Impact
NONE
Exploitability Score
3.9
Impact Score
2.7
CvssVersion
3.1

Exploit Intelligence

EPSS Score
30.16%
Probability of exploitation in next 30 days
EPSS Percentile
98.0%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.3016 is in the 97th percentile among its peer group of 51,506 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.1 Mastodon, and 0.4 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.1 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Patch Available

Remediation records are not available for this CVE.

References

lists.debian.org / debian-lts-announce/2025/04/msg00008.html
github.com / horde/base/releases/tag/v5.2.23
github.com / horde/imp/blob/fd9212ca3b72ff834504af4886f7d95138619bd4/doc/INSTALL.rst
github.com / horde/imp/blob/fd9212ca3b72ff834504af4886f7d95138619bd4/doc/INSTALL.rst
github.com / horde/imp/releases/tag/v6.2.27
github.com / horde/webmail/releases/tag/v5.2.22
github.com / natasaka/CVE-2025-30349
lists.horde.org / archives/imp/Week-of-Mon-20250317/057781.html
lists.horde.org / archives/imp/Week-of-Mon-20250317/057784.html
web.archive.org / web/20250321152616/https://lists.horde.org/archives/imp/Week-of-Mon-20250317/057781.html
web.archive.org / web/20250321162434/https://lists.horde.org/archives/imp/Week-of-Mon-20250317/057784.html
horde.org / apps/horde
horde.org / apps/imp
horde.org / download/horde