CVE-2025-30349
published 2025-03-21CVE-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…
PriorityP277high7.2CVSS 3.1
AVNACLPRNUINSCCLILAN
ITWEXPLOITVulnCheck KEV
Exploited in the wild
EPSS
29.19%
97.9th percentile
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.
Affected
2 ranges
| Vendor | Product | Version range | Fixed in |
|---|---|---|---|
| debian | php-horde-imp | < php-horde-imp 6.2.27-2+deb11u1 (bullseye) | php-horde-imp 6.2.27-2+deb11u1 (bullseye) |
| horde | imp | <= 6.2.27 | — |
Detection & IOCsextracted from sources · hover to see the quote
- →Look for inbound emails with text/html content containing an 'onerror' attribute in HTML tags, which may carry base64-encoded JavaScript payloads — the primary delivery vector for this XSS exploit. ↗
- →Flag emails where HTML body content includes base64-encoded JavaScript strings (e.g., patterns like 'onerror="eval(atob(...))"' or similar) targeting Horde IMP webmail users. ↗
- →Monitor Horde IMP webmail instances (versions through 6.2.27) and Horde Application Framework (through 5.2.23) for anomalous session activity or account takeover indicators following email rendering. ↗
- ·Debian bullseye has a fix available (6.2.27-2+deb11u1), but bookworm and sid remain open/unfixed as of the tracker update — prioritize patching bullseye deployments and treat bookworm/sid as still vulnerable. ↗
- ·The vulnerability scope is classified as 'local' by Debian, meaning exploitation requires the attacker to deliver a crafted email to a local user account on the Horde IMP instance. ↗
CVSS provenance
nvdv3.17.2HIGHCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:N
osv7.2HIGH
vulncheck7.2HIGH
vendor_debian7.2HIGH
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GHSA
GHSA-mchq-vv84-m9gr: Horde IMP through 6
ghsa_unreviewed·2025-03-21
CVE-2025-30349 [HIGH] CWE-79 GHSA-mchq-vv84-m9gr: Horde IMP through 6
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.
OSV
CVE-2025-30349: Horde IMP through 6
osv·2025-03-21·CVSS 7.2
CVE-2025-30349 [HIGH] CVE-2025-30349: Horde IMP through 6
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.
VulnCheck
horde imp Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
vulncheck·2025·CVSS 7.2
CVE-2025-30349 [HIGH] horde imp Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
horde imp Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
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.
Affected: Horde Horde IMP
Required Action: Apply remediations or mitigations per vendor instructions or discontinue use of the product if remediation or mitigations are unavailable.
Exploitation References: https://lists.horde.org/archives/imp/Week-of-Mon-20250317/057781.html; https://nvd.nist.gov/vuln/detail/CVE-2025-30349; https://www.cve.org/CVERecord?id=CVE-2025-30349
Exploit PoC: https://vulncheck.com/xdb/e071c412f
Debian
CVE-2025-30349: php-horde-imp - Horde IMP through 6.2.27, as used with Horde Application Framework through 5.2.2...
vendor_debian·2025·CVSS 7.2
CVE-2025-30349 [HIGH] CVE-2025-30349: php-horde-imp - Horde IMP through 6.2.27, as used with Horde Application Framework through 5.2.2...
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.
Scope: local
bookworm: open
bullseye: resolved (fixed in 6.2.27-2+deb11u1)
sid: open
No detection rules found.
No public exploits indexed.
No writeups or analysis indexed.
https://github.com/horde/base/releases/tag/v5.2.23https://github.com/horde/imp/blob/fd9212ca3b72ff834504af4886f7d95138619bd4/doc/INSTALL.rst?plain=1#L23-L25https://github.com/horde/imp/blob/fd9212ca3b72ff834504af4886f7d95138619bd4/doc/INSTALL.rst?plain=1#L61-L62https://github.com/horde/imp/releases/tag/v6.2.27https://github.com/horde/webmail/releases/tag/v5.2.22https://github.com/natasaka/CVE-2025-30349/https://lists.horde.org/archives/imp/Week-of-Mon-20250317/057781.htmlhttps://lists.horde.org/archives/imp/Week-of-Mon-20250317/057784.htmlhttps://web.archive.org/web/20250321152616/https://lists.horde.org/archives/imp/Week-of-Mon-20250317/057781.htmlhttps://web.archive.org/web/20250321162434/https://lists.horde.org/archives/imp/Week-of-Mon-20250317/057784.htmlhttps://www.horde.org/apps/hordehttps://www.horde.org/apps/imphttps://www.horde.org/download/hordehttps://lists.debian.org/debian-lts-announce/2025/04/msg00008.html
2025-03-21
Published
Exploited in the wild