Horde IMP's AppleDouble MIME viewer writes an attacker-controlled attachment name into an HTML status block without escaping it. In lib/Mime/Viewer/Appledouble.php, IMPrender() obtains the name of the data part with IMPContents::getPartName(), which returns the MIME part's own name parameter as supplied by the message, and passes it through sprintf into the text of an IMPMimeStatus object. IMPMimeStatus::toString() concatenates each text entry directly into the surrounding table markup, so the value reaches the rendered page verbatim. A message crafted as multipart/appledouble whose data part carries markup in its name parameter therefore executes script in the context of any user who views it, and the payload persists in the mailbox. Exploitation requires no account on the target system, only the ability to send mail to a user. Version 7.2.0 escapes the value with htmlspecialchars(). The researcher additionally chains this flaw with the arbitrary file read of CVE-2026-58451, and reports that script running in an administrator's session can reach an application code-execution path.
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.
Multiple SQL injection vulnerabilities in IMP 2.2.8 and earlier allow remote attackers to perform unauthorized database activities and possibly gain privileges via certain database functions such as checkprefs() in db.pgsql, as demonstrated using mailbox.php3.
Horde IMP 2.2.7 allows remote attackers to obtain the full web root pathname via an HTTP request for (1) poppassd.php3, (2) login.php3?reason=chpass2, (3) spelling.php3, and (4) ldap.search.php3?ldapserv=nonsense which leaks the information in error messages.
Cross-site scripting (XSS) vulnerability in Horde Internet Mail Program (IMP) before 5.0.22, as used in Horde Groupware Webmail Edition before 4.0.9, allows remote attackers to inject arbitrary web script or HTML via a crafted SVG image attachment, a different vulnerability than CVE-2012-5565.
Cross-site scripting (XSS) vulnerability in js/compose-dimp.js in Horde Internet Mail Program (IMP) before 5.0.24, as used in Horde Groupware Webmail Edition before 4.0.9, allows remote attackers to inject arbitrary web script or HTML via a crafted name for an attached file, related to the dynamic view.
Horde IMP 4.3.6 and earlier does not request that the web browser avoid DNS prefetching of domain names contained in e-mail messages, which makes it easier for remote attackers to determine the network location of the webmail user by logging DNS requests.
Multiple cross-site scripting (XSS) vulnerabilities in Horde Internet Mail Program (IMP) before 6.1.8, as used in Horde Groupware Webmail Edition before 5.1.5, allow remote attackers to inject arbitrary web script or HTML via an unspecified flag in the basic (1) mailbox or (2) message view.
Multiple cross-site scripting (XSS) vulnerabilities in Horde Internet Mail Program (IMP) before 6.1.8, as used in Horde Groupware Webmail Edition before 5.1.5, allow remote attackers to inject arbitrary web script or HTML via (1) unspecified flags or (2) a mailbox name in the dynamic mailbox view.
IMP 2.2 and earlier allows attackers to read and delete arbitrary files by modifying the attachmentname hidden form variable, which causes IMP to send the file to the attacker as an attachment.
Horde Internet Messaging Program (IMP) before 2.2.6 allows local users to read IMP configuration files and steal the Horde database password by placing the prefs.lang file containing PHP code on the server.
Cross-site scripting vulnerability in Horde Internet Messaging Program (IMP) before 2.2.6 and 1.2.6 allows remote attackers to execute arbitrary Javascript embedded in an email.
Horde IMP 2.2.4 and earlier allows local users to overwrite files via a symlink attack on a temporary file.
Cross-site scripting vulnerability in status.php3 for IMP 2.2.8 and HORDE 1.2.7 allows remote attackers to execute arbitrary web script and steal cookies of other IMP/HORDE users via the script parameter.
Cross-site scripting (XSS) vulnerability in the inline MIME viewer in Horde-IMP (Internet Messaging Program) 3.2.4 and earlier, when used with Internet Explorer, allows remote attackers to inject arbitrary web script or HTML via an e-mail message.
Unknown vulnerability in Horde IMP 3.2.3 and earlier, before a "security fix," does not properly validate input, which allows remote attackers to execute arbitrary script as other users via script or HTML in an e-mail message, possibly triggering a cross-site scripting (XSS) vulnerability.
Horde IMP 4.0.4 and earlier does not sanitize strings containing UTF16 null characters, which allows remote attackers to conduct cross-site scripting (XSS) attacks via UTF16 encoded attachments and strings that will be executed when viewed using Internet Explorer, which ignores the characters.
Cross-site scripting (XSS) vulnerability in Horde IMP Webmail client before 3.2.8 allows remote attackers to inject arbitrary web script or HTML via the parent's frame page title.
Cross-site scripting (XSS) vulnerability in horde/imp/search.php in Horde IMP H3 before 4.1.3 allows remote attackers to include arbitrary web script or HTML via multiple unspecified vectors related to folder names, as injected into the vfolderlabel form field in the IMP search screen.
Common Vulnerabilities and Exposures assigned an identifier CVE-2007-6018 to the following vulnerability:
IMP Webmail Client 4.1.5, Horde Application Framework 3.1.5, and Horde Groupware Webmail Edition 1.0.3 does not validate unspecified HTTP requests, which allows remote attackers to (1) delete arbitrary e-mail messages via a modified numeric ID or (2) "purge" deleted emails via a crafted email message.
References:
http://secunia.com/secuniaresearch/2007-102/advisory/ http://www.securityfocus.com/bid/27223 http://secunia.com/advisories/28020
Argument injection vulnerability in the cleanup cron script in Horde Project Horde and IMP before Horde Application Framework 3.1.4 allows local users to delete arbitrary files and possibly gain privileges via multiple space-delimited pathnames.
Multiple cross-site scripting (XSS) vulnerabilities in Horde IMP H3 4.1.3, and possibly earlier, allow remote attackers to inject arbitrary web script or HTML via (1) the email Subject header in thread.php, (2) the editquery parameter in search.php, or other unspecified parameters in search.php. NOTE: some of these details are obtained from third party information.
Cross-site scripting (XSS) vulnerability in fetchmailprefs.php in Horde IMP before 4.3.8, and Horde Groupware Webmail Edition before 1.2.7, allows remote attackers to inject arbitrary web script or HTML via the fmid parameter in a fetchmailprefssave action, related to the Fetchmail configuration.
Multiple cross-site scripting (XSS) vulnerabilities in Horde IMP before 5.0.18 and Horde Groupware Webmail Edition before 4.0.6 allow remote attackers to inject arbitrary web script or HTML via the (1) composeCache, (2) rtemode, or (3) filename parameters to the compose page; (4) formname parameter to the contacts popup window; or (5) IMAP mailbox names. NOTE: some of these details are obtained from third party information.
Upstream has released a new version of IMP (4.3.8) [1] that corrects the following flaw [2],[3]:
Fixed an XSS vulnerability in the Fetchmail configuration.
This has been assigned the name CVE-2010-3695. The current version of IMP in Fedora is 4.3.7 and is vulnerable to this flaw.
[1] http://lists.horde.org/archives/announce/2010/000557.html [2] http://git.horde.org/diff.php/imp/fetchmailprefs.php?rt=horde&r1=1.39.4.10&r2=1.39.4.11 [3] http://archives.neohapsis.com/archives/fulldisclosure/2010-09/0379.html
Common Vulnerabilities and Exposures assigned an identifier CVE-2007-6018 to the following vulnerability:
IMP Webmail Client 4.1.5, Horde Application Framework 3.1.5, and Horde Groupware Webmail Edition 1.0.3 does not validate unspecified HTTP requests, which allows remote attackers to (1) delete arbitrary e-mail messages via a modified numeric ID or (2) "purge" deleted emails via a crafted email message.
References:
http://secunia.com/secuniaresearch/2007-102/advisory/ http://www.securityfocus.com/bid/27223 http://secunia.com/advisories/28020