## Release 1.6.19

- Fix PHP Warning: Undefined variable $tmp_command in .../plugins/markasjunk/drivers/cmd_learn.php (#10294)
- Security: Fix CSS declaration smuggling via un-encoded ampersand emission
- Security: Fix CSS property injection via body `background` attribute
- Security: Fix email header injection via bare CR in the subject field
- Security: Fix email header injection via C-escape \r in the recipient display name
- Security: Fix email header injection via identity's organization field
- Security: Fix zero-click stored XSS via TNEF MIME tag injection in the attachment URL
- Security: Fix XSS in the HTML editor using text/enriched part content
- Security: Fix cross-user access in contact group membership (add/remove) in the SQL address book
- Security: Fix is_local_url() bypass via trailing-dot FQDN in stylesheet URL
- Security: Fix remote content blocking bypass via CSS escapes in FuncIRI attributes
- Security: Fix remote-content blocker bypass via SVG SMIL src animation
- Security: Fix SSRF bypass in Roundcube CSS proxy via hexadecimal IPv6-mapped IPv4 addresses

## Release 1.6.18

- Password: Fix fatal error "Class 'Zxcvbn' not found" (#10274)
- Fix out-of-bounds string reads on truncated compressed-RTF in the TNEF decoder (#10269)
- Security: Add basic validation for content proxied by the css proxy
- Security: Fix SSRF bypass via specific local address URLs using 100.64.0.0/10 and fe80::/10 nets
- Security: Fix SSRF filter bypass via various forms of nip.io/sslip.io hostnames evading is_local_url() check
- Security: Fix remote content blocking bypass via unclosed url() in a FuncIRI attribute
- Security: Fix LDAP filter injection via unescaped %u/%fu/%d substitution into the `search_filter`
- Security: Fix arbitrary Sieve script injection via a filter rule name bypassing `managesieve_disabled_actions`
- Security: Fix RCE via `cmd_learn` driver of markasjunk plugin
- Security: Fix IMAP command injection via mail search and LITERAL+ byte-count desynchronization
- Security: Fix password's modoboa driver leak of an authentication token to a user-controlled host
- Security: Fix stored XSS in "Add to address book" action
- Security: Fix HTML/CSS sanitization bypass via SVG animate `by` attribute

## Release 1.6.17

- Enigma: Support automatic public key lookup (import) using HKP v1 protocol (#5314)
- Enigma: Kolab WOAT Support (#8626)
- Security: Fix an infinite loop in TNEF (winmail.dat) decoder (#10193)
- Security: Fix various vulnerabilities in the password plugin using session-injected username
- Security: Fix stored XSS via unescaped attachment MIME type on the attachment-validation warning page [CVE-2026-54432]
- Security: Fix SSRF bypass via specific local address URLs - two new cases
- Security: Fix zero-click stored XSS in plain-text rendering [CVE-2026-54433]
- Security: Fix DoS via crafted compressed-RTF size in the TNEF (winmail.dat) file

## Release 1.6.16

- Fix potential too long value in IMAP ID command (#10136)
- Security: Fix stored XSS/HTML/CSS injection in subject field of the draft restore dialog
- Security: Fix CSS injection bypass in HTML sanitizer via SVG `<animate attributeName="style">`
- Security: Fix pre-auth SQL injection in `virtuser_query` plugin via preg_replace backslash escape bypass
- Security: Fix SSRF bypass via specific local address URLs
- Security: Fix bypass of remote image blocking via CSS var()
- Security: Fix local/private URL fetch bypass when remote resources were not allowed
- Security: Fix pre-auth arbitrary file delete via redis/memcache session poisoning bypass
- Security: Fix code injection vulnerability - remove support for code evaluation in LDAP `autovalues` option