Exploitation evidence
Known exploited · CISA KEV listed
Added 2024-02-12. Ransomware campaign use: Unknown.
CISA required action: Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable.
CISA due date: 2024-03-04. This is the catalog’s deadline, not an assessment of your organization’s exposure.
KEV checked 13 Nov 2026, 00:20 Jerusalem · Original catalog ↗Reported products and versions
n/a / n/a
Default status: Not specified
- affected: n/a
Fixes and workarounds
No explicit solution text in the downloaded CVE record. Consult the vendor advisory; unaffected version ranges are shown above as reported, not inferred as a patch recommendation.
Sources and related reporting
CVE Program record ↗ · Download tracked evidence as JSON
- https://github.com/roundcube/roundcubemail/commit/e92ec206a886461245e1672d8530cc93c618a49b
- https://roundcube.net/news/2023/09/15/security-update-1.6.3-released
- https://lists.debian.org/debian-lts-announce/2023/09/msg00024.html
- https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2023-43770
Observed change timeline
History begins when Egret first downloads each source. It is not the complete upstream CVE history.
12 Nov 2026, 18:20 Jerusalem · EPSS observation updated
Stored EPSS snapshot at this observation.
{
"date": "2026-11-12",
"epss": 0.6366,
"percentile": 0.99229
}10 Nov 2026, 18:20 Jerusalem · EPSS observation updated
Stored EPSS snapshot at this observation.
{
"date": "2026-11-10",
"epss": 0.6366,
"percentile": 0.99223
}09 Nov 2026, 18:20 Jerusalem · EPSS observation updated
Stored EPSS snapshot at this observation.
{
"date": "2026-11-09",
"epss": 0.6366,
"percentile": 0.99222
}08 Nov 2026, 18:20 Jerusalem · EPSS observation updated
Stored EPSS snapshot at this observation.
{
"date": "2026-11-08",
"epss": 0.6366,
"percentile": 0.99222
}07 Nov 2026, 18:20 Jerusalem · EPSS observation updated
Stored EPSS snapshot at this observation.
{
"date": "2026-11-07",
"epss": 0.6366,
"percentile": 0.99222
}06 Nov 2026, 18:20 Jerusalem · EPSS observation updated
Stored EPSS snapshot at this observation.
{
"date": "2026-11-06",
"epss": 0.6366,
"percentile": 0.99221
}06 Nov 2026, 06:20 Jerusalem · EPSS observation updated
Stored EPSS snapshot at this observation.
{
"date": "2026-11-05",
"epss": 0.6366,
"percentile": 0.9922
}04 Nov 2026, 18:20 Jerusalem · EPSS observation updated
Stored EPSS snapshot at this observation.
{
"date": "2026-11-04",
"epss": 0.6366,
"percentile": 0.99219
}04 Nov 2026, 18:20 Jerusalem · CVE Program record changed
Stored CNA snapshot at this observation.
{
"containers": {
"adp": [
{
"affected": [
{
"cpes": [
"cpe:2.3:a:roundcube:webmail:*:*:*:*:*:*:*:*"
],
"defaultStatus": "unknown",
"product": "webmail",
"vendor": "roundcube",
"versions": [
{
"lessThan": "1.4.14",
"status": "affected",
"version": "0",
"versionType": "custom"
}
]
},
{
"cpes": [
"cpe:2.3:a:roundcube:webmail:1.5.0:-:*:*:*:*:*:*"
],
"defaultStatus": "unknown",
"product": "webmail",
"vendor": "roundcube",
"versions": [
{
"lessThan": "1.5.4",
"status": "affected",
"version": "1.5.0",
"versionType": "custom"
}
]
},
{
"cpes": [
"cpe:2.3:a:roundcube:webmail:1.6.0:-:*:*:*:*:*:*"
],
"defaultStatus": "unknown",
"product": "webmail",
"vendor": "roundcube",
"versions": [
{
"lessThan": "1.6.3",
"status": "affected",
"version": "1.6.0",
"versionType": "custom"
}
]
},
{
"cpes": [
"cpe:2.3:o:debian:debian_linux:10:*:*:*:*:*:*:*"
],
"defaultStatus": "unknown",
"product": "debian_linux",
"vendor": "debian",
"versions": [
{
"status": "affected",
"version": "10"
}
]
}
],
"metrics": [
{
"cvssV3_1": {
"attackComplexity": "LOW",
"attackVector": "NETWORK",
"availabilityImpact": "NONE",
"baseScore": 6.1,
"baseSeverity": "MEDIUM",
"confidentialityImpact": "LOW",
"integrityImpact": "LOW",
"privilegesRequired": "NONE",
"scope": "CHANGED",
"userInteraction": "REQUIRED",
"vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N",
"version": "3.1"
}
},
{
"other": {
"content": {
"dateAdded": "2024-02-12",
"reference": "https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2023-43770"
},
"type": "kev"
}
},
{
"other": {
"content": {
"id": "CVE-2023-43770",
"options": [
{
"Exploitation": "active"
},
{
"Automatable": "no"
},
{
"Technical Impact": "partial"
}
],
"role": "CISA Coordinator",
"timestamp": "2024-05-01T18:43:07.516175Z",
"version": "2.0.3"
},
"type": "ssvc"
}
}
],
"problemTypes": [
{
"descriptions": [
{
"cweId": "CWE-79",
"description": "CWE-79 Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')",
"lang": "en",
"type": "CWE"
}
]
}
],
"providerMetadata": {
"dateUpdated": "2025-10-21T23:05:36.969Z",
"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
"shortName": "CISA-ADP"
},
"references": [
{
"tags": [
"government-resource"
],
"url": "https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2023-43770"
}
],
"timeline": [
{
"lang": "en",
"time": "2024-02-12T00:00:00.000Z",
"value": "CVE-2023-43770 added to CISA KEV"
}
],
"title": "CISA ADP Vulnrichment"
},
{
"providerMetadata": {
"dateUpdated": "2024-08-02T19:52:11.104Z",
"orgId": "af854a3a-2127-422b-91ae-364da2661108",
"shortName": "CVE"
},
"references": [
{
"tags": [
"x_transferred"
],
"url": "https://github.com/roundcube/roundcubemail/commit/e92ec206a886461245e1672d8530cc93c618a49b"
},
{
"tags": [
"x_transferred"
],
"url": "https://roundcube.net/news/2023/09/15/security-update-1.6.3-released"
},
{
"name": "[debian-lts-announce] 20230922 [SECURITY] [DLA 3577-1] roundcube security update",
"tags": [
"mailing-list",
"x_transferred"
],
"url": "https://lists.debian.org/debian-lts-announce/2023/09/msg00024.html"
}
],
"title": "CVE Program Container"
}
],
"cna": {
"affected": [
{
"product": "n/a",
"vendor": "n/a",
"versions": [
{
"status": "affected",
"version": "n/a"
}
]
}
],
"descriptions": [
{
"lang": "en",
"value": "Roundcube before 1.4.14, 1.5.x before 1.5.4, and 1.6.x before 1.6.3 allows XSS via text/plain e-mail messages with crafted links because of program/lib/Roundcube/rcube_string_replacer.php behavior."
}
],
"problemTypes": [
{
"descriptions": [
{
"description": "n/a",
"lang": "en",
"type": "text"
}
]
}
],
"providerMetadata": {
"dateUpdated": "2023-09-22T13:06:08.676Z",
"orgId": "8254265b-2729-46b6-b9e3-3dfca2d5bfca",
"shortName": "mitre"
},
"references": [
{
"url": "https://github.com/roundcube/roundcubemail/commit/e92ec206a886461245e1672d8530cc93c618a49b"
},
{
"url": "https://roundcube.net/news/2023/09/15/security-update-1.6.3-released"
},
{
"name": "[debian-lts-announce] 20230922 [SECURITY] [DLA 3577-1] roundcube security update",
"tags": [
"mailing-list"
],
"url": "https://lists.debian.org/debian-lts-announce/2023/09/msg00024.html"
}
]
}
},
"cveMetadata": {
"assignerOrgId": "8254265b-2729-46b6-b9e3-3dfca2d5bfca",
"assignerShortName": "mitre",
"cveId": "CVE-2023-43770",
"datePublished": "2023-09-22T00:00:00.000Z",
"dateReserved": "2023-09-22T00:00:00.000Z",
"dateUpdated": "2025-10-21T23:05:36.969Z",
"state": "PUBLISHED"
},
"dataType": "CVE_RECORD",
"dataVersion": "5.1"
}03 Nov 2026, 18:20 Jerusalem · EPSS observation updated
Stored EPSS snapshot at this observation.
{
"date": "2026-11-03",
"epss": 0.6366,
"percentile": 0.99218
}03 Nov 2026, 02:22 Jerusalem · EPSS observation updated
Stored EPSS snapshot at this observation.
{
"date": "2026-11-02",
"epss": 0.6366,
"percentile": 0.99217
}03 Nov 2026, 02:22 Jerusalem · CISA KEV status changed
Stored KEV snapshot at this observation.
{
"cveID": "CVE-2023-43770",
"cwes": [
"CWE-79"
],
"dateAdded": "2024-02-12",
"dueDate": "2024-03-04",
"forensicTriage": "No",
"knownRansomwareCampaignUse": "Unknown",
"notes": "https://roundcube.net/news/2023/09/15/security-update-1.6.3-released ; https://nvd.nist.gov/vuln/detail/CVE-2023-43770",
"product": "Webmail",
"requiredAction": "Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable.",
"shortDescription": "Roundcube Webmail contains a persistent cross-site scripting (XSS) vulnerability that can lead to information disclosure via malicious link references in plain/text messages.",
"vendorProject": "Roundcube",
"vulnerabilityName": "Roundcube Webmail Persistent Cross-Site Scripting (XSS) Vulnerability"
}