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.
{
"versions": [
{
"introduced": "0"
},
{
"last_affected": "5.2.23"
}
]
}{
"versions": [
{
"introduced": "0"
},
{
"last_affected": "6.2.27"
}
]
}