ubuntu-cve-2021-37746
Vulnerability from osv_ubuntu
Published
2021-07-30 15:15
Modified
2026-05-20 14:53
Summary
Details
textview_uri_security_check in textview.c in Claws Mail before 3.18.0, and Sylpheed through 3.7.0, does not have sufficient link checks before accepting a click.
Severity
6.1 (Medium)
N/A (UNKNOWN)
{
"affected": [
{
"ecosystem_specific": {
"binaries": [
{
"binary_name": "claws-mail",
"binary_version": "3.13.2-1ubuntu1"
},
{
"binary_name": "claws-mail-acpi-notifier",
"binary_version": "3.13.2-1ubuntu1"
},
{
"binary_name": "claws-mail-address-keeper",
"binary_version": "3.13.2-1ubuntu1"
},
{
"binary_name": "claws-mail-archiver-plugin",
"binary_version": "3.13.2-1ubuntu1"
},
{
"binary_name": "claws-mail-attach-remover",
"binary_version": "3.13.2-1ubuntu1"
},
{
"binary_name": "claws-mail-attach-warner",
"binary_version": "3.13.2-1ubuntu1"
},
{
"binary_name": "claws-mail-bogofilter",
"binary_version": "3.13.2-1ubuntu1"
},
{
"binary_name": "claws-mail-bsfilter-plugin",
"binary_version": "3.13.2-1ubuntu1"
},
{
"binary_name": "claws-mail-clamd-plugin",
"binary_version": "3.13.2-1ubuntu1"
},
{
"binary_name": "claws-mail-extra-plugins",
"binary_version": "3.13.2-1ubuntu1"
},
{
"binary_name": "claws-mail-fancy-plugin",
"binary_version": "3.13.2-1ubuntu1"
},
{
"binary_name": "claws-mail-feeds-reader",
"binary_version": "3.13.2-1ubuntu1"
},
{
"binary_name": "claws-mail-fetchinfo-plugin",
"binary_version": "3.13.2-1ubuntu1"
},
{
"binary_name": "claws-mail-gdata-plugin",
"binary_version": "3.13.2-1ubuntu1"
},
{
"binary_name": "claws-mail-i18n",
"binary_version": "3.13.2-1ubuntu1"
},
{
"binary_name": "claws-mail-libravatar",
"binary_version": "3.13.2-1ubuntu1"
},
{
"binary_name": "claws-mail-mailmbox-plugin",
"binary_version": "3.13.2-1ubuntu1"
},
{
"binary_name": "claws-mail-managesieve",
"binary_version": "3.13.2-1ubuntu1"
},
{
"binary_name": "claws-mail-multi-notifier",
"binary_version": "3.13.2-1ubuntu1"
},
{
"binary_name": "claws-mail-newmail-plugin",
"binary_version": "3.13.2-1ubuntu1"
},
{
"binary_name": "claws-mail-pdf-viewer",
"binary_version": "3.13.2-1ubuntu1"
},
{
"binary_name": "claws-mail-perl-filter",
"binary_version": "3.13.2-1ubuntu1"
},
{
"binary_name": "claws-mail-pgpinline",
"binary_version": "3.13.2-1ubuntu1"
},
{
"binary_name": "claws-mail-pgpmime",
"binary_version": "3.13.2-1ubuntu1"
},
{
"binary_name": "claws-mail-plugins",
"binary_version": "3.13.2-1ubuntu1"
},
{
"binary_name": "claws-mail-python-plugin",
"binary_version": "3.13.2-1ubuntu1"
},
{
"binary_name": "claws-mail-smime-plugin",
"binary_version": "3.13.2-1ubuntu1"
},
{
"binary_name": "claws-mail-spam-report",
"binary_version": "3.13.2-1ubuntu1"
},
{
"binary_name": "claws-mail-spamassassin",
"binary_version": "3.13.2-1ubuntu1"
},
{
"binary_name": "claws-mail-tnef-parser",
"binary_version": "3.13.2-1ubuntu1"
},
{
"binary_name": "claws-mail-tools",
"binary_version": "3.13.2-1ubuntu1"
},
{
"binary_name": "claws-mail-vcalendar-plugin",
"binary_version": "3.13.2-1ubuntu1"
}
]
},
"package": {
"ecosystem": "Ubuntu:16.04:LTS",
"name": "claws-mail",
"purl": "pkg:deb/ubuntu/claws-mail@3.13.2-1ubuntu1?arch=source\u0026distro=xenial"
},
"ranges": [
{
"events": [
{
"introduced": "0"
}
],
"type": "ECOSYSTEM"
}
],
"versions": [
"3.12.0-1ubuntu1",
"3.12.0-1ubuntu2",
"3.13.1-1.1ubuntu1",
"3.13.1-1.1ubuntu2",
"3.13.1-1.1ubuntu3",
"3.13.2-1ubuntu1"
]
},
{
"ecosystem_specific": {
"binaries": [
{
"binary_name": "sylpheed",
"binary_version": "3.5.0~rc2-1ubuntu1"
},
{
"binary_name": "sylpheed-i18n",
"binary_version": "3.5.0~rc2-1ubuntu1"
},
{
"binary_name": "sylpheed-plugins",
"binary_version": "3.5.0~rc2-1ubuntu1"
}
]
},
"package": {
"ecosystem": "Ubuntu:16.04:LTS",
"name": "sylpheed",
"purl": "pkg:deb/ubuntu/sylpheed@3.5.0~rc2-1ubuntu1?arch=source\u0026distro=xenial"
},
"ranges": [
{
"events": [
{
"introduced": "0"
}
],
"type": "ECOSYSTEM"
}
],
"versions": [
"3.4.2-0ubuntu1",
"3.5.0~rc2-1ubuntu1"
]
},
{
"ecosystem_specific": {
"binaries": [
{
"binary_name": "claws-mail",
"binary_version": "3.16.0-1"
},
{
"binary_name": "claws-mail-acpi-notifier",
"binary_version": "3.16.0-1"
},
{
"binary_name": "claws-mail-address-keeper",
"binary_version": "3.16.0-1"
},
{
"binary_name": "claws-mail-archiver-plugin",
"binary_version": "3.16.0-1"
},
{
"binary_name": "claws-mail-attach-remover",
"binary_version": "3.16.0-1"
},
{
"binary_name": "claws-mail-attach-warner",
"binary_version": "3.16.0-1"
},
{
"binary_name": "claws-mail-bogofilter",
"binary_version": "3.16.0-1"
},
{
"binary_name": "claws-mail-bsfilter-plugin",
"binary_version": "3.16.0-1"
},
{
"binary_name": "claws-mail-clamd-plugin",
"binary_version": "3.16.0-1"
},
{
"binary_name": "claws-mail-extra-plugins",
"binary_version": "3.16.0-1"
},
{
"binary_name": "claws-mail-feeds-reader",
"binary_version": "3.16.0-1"
},
{
"binary_name": "claws-mail-fetchinfo-plugin",
"binary_version": "3.16.0-1"
},
{
"binary_name": "claws-mail-gdata-plugin",
"binary_version": "3.16.0-1"
},
{
"binary_name": "claws-mail-i18n",
"binary_version": "3.16.0-1"
},
{
"binary_name": "claws-mail-libravatar",
"binary_version": "3.16.0-1"
},
{
"binary_name": "claws-mail-mailmbox-plugin",
"binary_version": "3.16.0-1"
},
{
"binary_name": "claws-mail-managesieve",
"binary_version": "3.16.0-1"
},
{
"binary_name": "claws-mail-multi-notifier",
"binary_version": "3.16.0-1"
},
{
"binary_name": "claws-mail-newmail-plugin",
"binary_version": "3.16.0-1"
},
{
"binary_name": "claws-mail-pdf-viewer",
"binary_version": "3.16.0-1"
},
{
"binary_name": "claws-mail-perl-filter",
"binary_version": "3.16.0-1"
},
{
"binary_name": "claws-mail-pgpinline",
"binary_version": "3.16.0-1"
},
{
"binary_name": "claws-mail-pgpmime",
"binary_version": "3.16.0-1"
},
{
"binary_name": "claws-mail-plugins",
"binary_version": "3.16.0-1"
},
{
"binary_name": "claws-mail-python-plugin",
"binary_version": "3.16.0-1"
},
{
"binary_name": "claws-mail-smime-plugin",
"binary_version": "3.16.0-1"
},
{
"binary_name": "claws-mail-spam-report",
"binary_version": "3.16.0-1"
},
{
"binary_name": "claws-mail-spamassassin",
"binary_version": "3.16.0-1"
},
{
"binary_name": "claws-mail-tnef-parser",
"binary_version": "3.16.0-1"
},
{
"binary_name": "claws-mail-tools",
"binary_version": "3.16.0-1"
},
{
"binary_name": "claws-mail-vcalendar-plugin",
"binary_version": "3.16.0-1"
}
]
},
"package": {
"ecosystem": "Ubuntu:18.04:LTS",
"name": "claws-mail",
"purl": "pkg:deb/ubuntu/claws-mail@3.16.0-1?arch=source\u0026distro=bionic"
},
"ranges": [
{
"events": [
{
"introduced": "0"
}
],
"type": "ECOSYSTEM"
}
],
"versions": [
"3.15.0-2build2",
"3.15.1-1",
"3.15.1-1ubuntu1",
"3.16.0-1"
]
},
{
"ecosystem_specific": {
"binaries": [
{
"binary_name": "sylpheed",
"binary_version": "3.5.1-1ubuntu3.18.04.1"
},
{
"binary_name": "sylpheed-i18n",
"binary_version": "3.5.1-1ubuntu3.18.04.1"
},
{
"binary_name": "sylpheed-plugins",
"binary_version": "3.5.1-1ubuntu3.18.04.1"
}
]
},
"package": {
"ecosystem": "Ubuntu:18.04:LTS",
"name": "sylpheed",
"purl": "pkg:deb/ubuntu/sylpheed@3.5.1-1ubuntu3.18.04.1?arch=source\u0026distro=bionic"
},
"ranges": [
{
"events": [
{
"introduced": "0"
}
],
"type": "ECOSYSTEM"
}
],
"versions": [
"3.5.1-1ubuntu2",
"3.5.1-1ubuntu3",
"3.5.1-1ubuntu3.18.04.1"
]
},
{
"ecosystem_specific": {
"binaries": [
{
"binary_name": "claws-mail",
"binary_version": "3.17.5-2"
},
{
"binary_name": "claws-mail-acpi-notifier",
"binary_version": "3.17.5-2"
},
{
"binary_name": "claws-mail-address-keeper",
"binary_version": "3.17.5-2"
},
{
"binary_name": "claws-mail-archiver-plugin",
"binary_version": "3.17.5-2"
},
{
"binary_name": "claws-mail-attach-remover",
"binary_version": "3.17.5-2"
},
{
"binary_name": "claws-mail-attach-warner",
"binary_version": "3.17.5-2"
},
{
"binary_name": "claws-mail-bogofilter",
"binary_version": "3.17.5-2"
},
{
"binary_name": "claws-mail-bsfilter-plugin",
"binary_version": "3.17.5-2"
},
{
"binary_name": "claws-mail-clamd-plugin",
"binary_version": "3.17.5-2"
},
{
"binary_name": "claws-mail-dillo-viewer",
"binary_version": "3.17.5-2"
},
{
"binary_name": "claws-mail-extra-plugins",
"binary_version": "3.17.5-2"
},
{
"binary_name": "claws-mail-feeds-reader",
"binary_version": "3.17.5-2"
},
{
"binary_name": "claws-mail-fetchinfo-plugin",
"binary_version": "3.17.5-2"
},
{
"binary_name": "claws-mail-gdata-plugin",
"binary_version": "3.17.5-2"
},
{
"binary_name": "claws-mail-i18n",
"binary_version": "3.17.5-2"
},
{
"binary_name": "claws-mail-libravatar",
"binary_version": "3.17.5-2"
},
{
"binary_name": "claws-mail-litehtml-viewer",
"binary_version": "3.17.5-2"
},
{
"binary_name": "claws-mail-mailmbox-plugin",
"binary_version": "3.17.5-2"
},
{
"binary_name": "claws-mail-managesieve",
"binary_version": "3.17.5-2"
},
{
"binary_name": "claws-mail-multi-notifier",
"binary_version": "3.17.5-2"
},
{
"binary_name": "claws-mail-newmail-plugin",
"binary_version": "3.17.5-2"
},
{
"binary_name": "claws-mail-pdf-viewer",
"binary_version": "3.17.5-2"
},
{
"binary_name": "claws-mail-perl-filter",
"binary_version": "3.17.5-2"
},
{
"binary_name": "claws-mail-pgpinline",
"binary_version": "3.17.5-2"
},
{
"binary_name": "claws-mail-pgpmime",
"binary_version": "3.17.5-2"
},
{
"binary_name": "claws-mail-plugins",
"binary_version": "3.17.5-2"
},
{
"binary_name": "claws-mail-smime-plugin",
"binary_version": "3.17.5-2"
},
{
"binary_name": "claws-mail-spam-report",
"binary_version": "3.17.5-2"
},
{
"binary_name": "claws-mail-spamassassin",
"binary_version": "3.17.5-2"
},
{
"binary_name": "claws-mail-tnef-parser",
"binary_version": "3.17.5-2"
},
{
"binary_name": "claws-mail-tools",
"binary_version": "3.17.5-2"
},
{
"binary_name": "claws-mail-vcalendar-plugin",
"binary_version": "3.17.5-2"
}
]
},
"package": {
"ecosystem": "Ubuntu:20.04:LTS",
"name": "claws-mail",
"purl": "pkg:deb/ubuntu/claws-mail@3.17.5-2?arch=source\u0026distro=focal"
},
"ranges": [
{
"events": [
{
"introduced": "0"
}
],
"type": "ECOSYSTEM"
}
],
"versions": [
"3.17.4-1",
"3.17.4-1build1",
"3.17.4-2build2",
"3.17.4-2ubuntu1",
"3.17.5-2"
]
},
{
"ecosystem_specific": {
"binaries": [
{
"binary_name": "sylpheed",
"binary_version": "3.7.0-6ubuntu1"
},
{
"binary_name": "sylpheed-i18n",
"binary_version": "3.7.0-6ubuntu1"
},
{
"binary_name": "sylpheed-plugins",
"binary_version": "3.7.0-6ubuntu1"
}
]
},
"package": {
"ecosystem": "Ubuntu:20.04:LTS",
"name": "sylpheed",
"purl": "pkg:deb/ubuntu/sylpheed@3.7.0-6ubuntu1?arch=source\u0026distro=focal"
},
"ranges": [
{
"events": [
{
"introduced": "0"
}
],
"type": "ECOSYSTEM"
}
],
"versions": [
"3.5.1-1ubuntu5",
"3.7.0-6ubuntu1"
]
},
{
"ecosystem_specific": {
"binaries": [
{
"binary_name": "claws-mail",
"binary_version": "4.0.0-3"
},
{
"binary_name": "claws-mail-acpi-notifier",
"binary_version": "4.0.0-3"
},
{
"binary_name": "claws-mail-address-keeper",
"binary_version": "4.0.0-3"
},
{
"binary_name": "claws-mail-archiver-plugin",
"binary_version": "4.0.0-3"
},
{
"binary_name": "claws-mail-attach-remover",
"binary_version": "4.0.0-3"
},
{
"binary_name": "claws-mail-attach-warner",
"binary_version": "4.0.0-3"
},
{
"binary_name": "claws-mail-bogofilter",
"binary_version": "4.0.0-3"
},
{
"binary_name": "claws-mail-bsfilter-plugin",
"binary_version": "4.0.0-3"
},
{
"binary_name": "claws-mail-clamd-plugin",
"binary_version": "4.0.0-3"
},
{
"binary_name": "claws-mail-dillo-viewer",
"binary_version": "4.0.0-3"
},
{
"binary_name": "claws-mail-extra-plugins",
"binary_version": "4.0.0-3"
},
{
"binary_name": "claws-mail-fancy-plugin",
"binary_version": "4.0.0-3"
},
{
"binary_name": "claws-mail-feeds-reader",
"binary_version": "4.0.0-3"
},
{
"binary_name": "claws-mail-fetchinfo-plugin",
"binary_version": "4.0.0-3"
},
{
"binary_name": "claws-mail-gdata-plugin",
"binary_version": "4.0.0-3"
},
{
"binary_name": "claws-mail-i18n",
"binary_version": "4.0.0-3"
},
{
"binary_name": "claws-mail-libravatar",
"binary_version": "4.0.0-3"
},
{
"binary_name": "claws-mail-litehtml-viewer",
"binary_version": "4.0.0-3"
},
{
"binary_name": "claws-mail-mailmbox-plugin",
"binary_version": "4.0.0-3"
},
{
"binary_name": "claws-mail-managesieve",
"binary_version": "4.0.0-3"
},
{
"binary_name": "claws-mail-multi-notifier",
"binary_version": "4.0.0-3"
},
{
"binary_name": "claws-mail-newmail-plugin",
"binary_version": "4.0.0-3"
},
{
"binary_name": "claws-mail-pdf-viewer",
"binary_version": "4.0.0-3"
},
{
"binary_name": "claws-mail-perl-filter",
"binary_version": "4.0.0-3"
},
{
"binary_name": "claws-mail-pgpinline",
"binary_version": "4.0.0-3"
},
{
"binary_name": "claws-mail-pgpmime",
"binary_version": "4.0.0-3"
},
{
"binary_name": "claws-mail-plugins",
"binary_version": "4.0.0-3"
},
{
"binary_name": "claws-mail-python-plugin",
"binary_version": "4.0.0-3"
},
{
"binary_name": "claws-mail-smime-plugin",
"binary_version": "4.0.0-3"
},
{
"binary_name": "claws-mail-spam-report",
"binary_version": "4.0.0-3"
},
{
"binary_name": "claws-mail-spamassassin",
"binary_version": "4.0.0-3"
},
{
"binary_name": "claws-mail-tnef-parser",
"binary_version": "4.0.0-3"
},
{
"binary_name": "claws-mail-tools",
"binary_version": "4.0.0-3"
},
{
"binary_name": "claws-mail-vcalendar-plugin",
"binary_version": "4.0.0-3"
}
]
},
"package": {
"ecosystem": "Ubuntu:22.04:LTS",
"name": "claws-mail",
"purl": "pkg:deb/ubuntu/claws-mail@4.0.0-3?arch=source\u0026distro=jammy"
},
"ranges": [
{
"events": [
{
"introduced": "0"
}
],
"type": "ECOSYSTEM"
}
],
"versions": [
"3.17.8-1build2",
"3.18.0-1",
"4.0.0-2",
"4.0.0-2build1",
"4.0.0-3"
]
},
{
"ecosystem_specific": {
"binaries": [
{
"binary_name": "sylpheed",
"binary_version": "3.7.0-8ubuntu3"
},
{
"binary_name": "sylpheed-i18n",
"binary_version": "3.7.0-8ubuntu3"
},
{
"binary_name": "sylpheed-plugins",
"binary_version": "3.7.0-8ubuntu3"
}
]
},
"package": {
"ecosystem": "Ubuntu:22.04:LTS",
"name": "sylpheed",
"purl": "pkg:deb/ubuntu/sylpheed@3.7.0-8ubuntu3?arch=source\u0026distro=jammy"
},
"ranges": [
{
"events": [
{
"introduced": "0"
}
],
"type": "ECOSYSTEM"
}
],
"versions": [
"3.7.0-8ubuntu2",
"3.7.0-8ubuntu3"
]
},
{
"ecosystem_specific": {
"binaries": [
{
"binary_name": "claws-mail",
"binary_version": "4.2.0-2build7"
},
{
"binary_name": "claws-mail-acpi-notifier",
"binary_version": "4.2.0-2build7"
},
{
"binary_name": "claws-mail-address-keeper",
"binary_version": "4.2.0-2build7"
},
{
"binary_name": "claws-mail-archiver-plugin",
"binary_version": "4.2.0-2build7"
},
{
"binary_name": "claws-mail-attach-remover",
"binary_version": "4.2.0-2build7"
},
{
"binary_name": "claws-mail-attach-warner",
"binary_version": "4.2.0-2build7"
},
{
"binary_name": "claws-mail-bogofilter",
"binary_version": "4.2.0-2build7"
},
{
"binary_name": "claws-mail-bsfilter-plugin",
"binary_version": "4.2.0-2build7"
},
{
"binary_name": "claws-mail-clamd-plugin",
"binary_version": "4.2.0-2build7"
},
{
"binary_name": "claws-mail-dillo-viewer",
"binary_version": "4.2.0-2build7"
},
{
"binary_name": "claws-mail-extra-plugins",
"binary_version": "4.2.0-2build7"
},
{
"binary_name": "claws-mail-fancy-plugin",
"binary_version": "4.2.0-2build7"
},
{
"binary_name": "claws-mail-feeds-reader",
"binary_version": "4.2.0-2build7"
},
{
"binary_name": "claws-mail-fetchinfo-plugin",
"binary_version": "4.2.0-2build7"
},
{
"binary_name": "claws-mail-i18n",
"binary_version": "4.2.0-2build7"
},
{
"binary_name": "claws-mail-keyword-warner",
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{
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{
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{
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{
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},
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],
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},
{
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},
{
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},
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},
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}
],
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],
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},
{
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],
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],
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]
},
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}
],
"aliases": [],
"details": "textview_uri_security_check in textview.c in Claws Mail before 3.18.0, and Sylpheed through 3.7.0, does not have sufficient link checks before accepting a click.",
"id": "UBUNTU-CVE-2021-37746",
"modified": "2026-05-20T14:53:27Z",
"published": "2021-07-30T15:15:00Z",
"references": [
{
"type": "REPORT",
"url": "https://ubuntu.com/security/CVE-2021-37746"
},
{
"type": "REPORT",
"url": "https://git.claws-mail.org/?p=claws.git;a=commit;h=ac286a71ed78429e16c612161251b9ea90ccd431"
},
{
"type": "REPORT",
"url": "https://sylpheed.sraoss.jp/sylpheed/v3.7/sylpheed-3.7.0.tar.xz"
},
{
"type": "REPORT",
"url": "https://claws-mail.org/download.php?file=releases/claws-mail-3.18.0.tar.xz"
},
{
"type": "REPORT",
"url": "https://www.cve.org/CVERecord?id=CVE-2021-37746"
}
],
"related": [],
"schema_version": "1.7.0",
"severity": [
{
"score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N",
"type": "CVSS_V3"
},
{
"score": "medium",
"type": "Ubuntu"
}
],
"upstream": [
"CVE-2021-37746"
]
}
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Experimental. This forecast is provided for visualization only and may change without notice. Do not use it for operational decisions.
Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.
Sightings
| Author | Source | Type | Date | Other |
|---|
Nomenclature
- Seen: The vulnerability was mentioned, discussed, or observed by the user.
- Confirmed: The vulnerability has been validated from an analyst's perspective.
- Published Proof of Concept: A public proof of concept is available for this vulnerability.
- Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
- Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
- Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
- Not confirmed: The user expressed doubt about the validity of the vulnerability.
- Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.
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