CVE-2023-43770 (GCVE-0-2023-43770)
Vulnerability from cvelistv5 – Published: 2023-09-22 00:00 – Updated: 2025-10-21 23:05Summary
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.
Severity
6.1 (Medium)
SSVC
Exploitation: active
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2024-05-01 18:43 UTC
CWE
- n/a
- CWE-79 - Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
Assigner
References
4 references
Impacted products
4 products
| Vendor | Product | Version | CPE status | |
|---|---|---|---|---|
| roundcube | webmail |
Affected:
0 , < 1.4.14
(custom)
cpe:2.3:a:roundcube:webmail:*:*:*:*:*:*:*:* |
||
| roundcube | webmail |
Affected:
1.5.0 , < 1.5.4
(custom)
cpe:2.3:a:roundcube:webmail:1.5.0:-:*:*:*:*:*:* |
||
| roundcube | webmail |
Affected:
1.6.0 , < 1.6.3
(custom)
cpe:2.3:a:roundcube:webmail:1.6.0:-:*:*:*:*:*:* |
||
| debian | debian_linux |
Affected:
10
cpe:2.3:o:debian:debian_linux:10:*:*:*:*:*:*:* |
CISA
Known Exploited Vulnerability - GCVE BCP-07 Compliant
KEV entry ID: 5715499d-83d3-4440-9649-c3058b603350
Exploited: Yes
Timestamps
First Seen: 2024-02-12
Asserted: 2024-02-12
Scope
Notes: KEV entry: Roundcube Webmail Persistent Cross-Site Scripting (XSS) Vulnerability | Affected: Roundcube / Webmail | Description: Roundcube Webmail contains a persistent cross-site scripting (XSS) vulnerability that can lead to information disclosure via malicious link references in plain/text messages. | Required action: Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable. | Due date: 2024-03-04 | Known ransomware campaign use (KEV): Unknown | Notes (KEV): https://roundcube.net/news/2023/09/15/security-update-1.6.3-released ; https://nvd.nist.gov/vuln/detail/CVE-2023-43770
Evidence
Type: Vendor Report
Signal: Successful Exploitation
Confidence: 80%
Source: cisa-kev
Details
| Cwes | CWE-79 |
|---|---|
| Feed | CISA Known Exploited Vulnerabilities Catalog |
| Product | Webmail |
| Due Date | 2024-03-04 |
| Date Added | 2024-02-12 |
| Vendorproject | Roundcube |
| Vulnerabilityname | Roundcube Webmail Persistent Cross-Site Scripting (XSS) Vulnerability |
| Knownransomwarecampaignuse | Unknown |
References
Created: 2026-02-02 12:26 UTC
| Updated: 2026-02-06 07:17 UTC
Previdian
Known Exploited Vulnerability - GCVE BCP-07 Compliant
KEV entry ID: 0ced653c-00f1-44bc-83d7-2f384114a2a7
Exploited: Yes
Timestamps
First Seen: 2024-02-12
Asserted: 2024-02-12
Scope
Notes: KEVIntel entry: 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... | Affected: Roundcube / Roundcube Webmail | CVSS: 6.1 (MEDIUM) | Used in malware: unknown | Not yet in CISA KEV: False
Evidence
Type: Public Report
Signal: Successful Exploitation
Confidence: 70%
Source: kevintel
Details
| Feed | KEVIntel (kevintel.com) |
|---|---|
| Title | 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... |
| Vendor | Roundcube |
| Product | Roundcube Webmail |
| Added Date | 2024-02-12T00:00:00.000Z |
| Cvss Score | 6.1 |
| Epss Score | None |
| Cvss Severity | MEDIUM |
| Epss Percentile | None |
| Used In Malware | unknown |
| Ahead Of Cisa Kev | None |
| Not Yet In Cisa Kev | False |
References
Created: 2026-06-23 14:05 UTC
| Updated: 2026-07-10 06:14 UTC
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},
{
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],
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},
{
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"tags": [
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],
"url": "https://roundcube.net/news/2023/09/15/security-update-1.6.3-released"
},
{
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},
{
"source": "af854a3a-2127-422b-91ae-364da2661108",
"tags": [
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],
"url": "https://lists.debian.org/debian-lts-announce/2023/09/msg00024.html"
},
{
"source": "af854a3a-2127-422b-91ae-364da2661108",
"tags": [
"Release Notes"
],
"url": "https://roundcube.net/news/2023/09/15/security-update-1.6.3-released"
},
{
"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
"tags": [
"US Government Resource"
],
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}
],
"sourceIdentifier": "cve@mitre.org",
"vulnStatus": "Analyzed",
"weaknesses": [
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{
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}
],
"source": "nvd@nist.gov",
"type": "Primary"
},
{
"description": [
{
"lang": "en",
"value": "CWE-79"
}
],
"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
"type": "Secondary"
}
]
}
},
"redhat_vex": {
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"id": "CVE-2023-43770",
"initial_release_date": "2023-01-01T00:00:00+00:00",
"product_status:known_not_affected": "1",
"source": "Red Hat CSAF VEX",
"status": "final",
"title": "CVE-2023-43770",
"url": "https://security.access.redhat.com/data/csaf/v2/vex/2023/cve-2023-43770.json",
"version": "3"
},
"suse_vex": {
"aggregate_severity": "moderate",
"current_release_date": "2025-02-16T06:06:18Z",
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"id": "CVE-2023-43770",
"initial_release_date": "2023-09-23T02:07:40Z",
"source": "SUSE CSAF VEX",
"status": "interim",
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"url": "https://ftp.suse.com/pub/projects/security/csaf-vex/cve-2023-43770.json",
"version": "5"
},
"vulnrichment": {
"containers": {
"adp": [
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"references": [
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"tags": [
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],
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},
{
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],
"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": [
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],
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}
],
"title": "CVE Program Container"
},
{
"affected": [
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],
"defaultStatus": "unknown",
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"versions": [
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{
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],
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]
},
{
"cpes": [
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],
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"product": "webmail",
"vendor": "roundcube",
"versions": [
{
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"status": "affected",
"version": "1.6.0",
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}
]
},
{
"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": {
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"dateAdded": "2024-02-12",
"reference": "https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2023-43770"
},
"type": "kev"
}
},
{
"other": {
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{
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},
{
"Automatable": "no"
},
{
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}
],
"role": "CISA Coordinator",
"timestamp": "2024-05-01T18:43:07.516175Z",
"version": "2.0.3"
},
"type": "ssvc"
}
}
],
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{
"descriptions": [
{
"cweId": "CWE-79",
"description": "CWE-79 Improper Neutralization of Input During Web Page Generation (\u0027Cross-site Scripting\u0027)",
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]
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],
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},
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{
"tags": [
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],
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}
],
"timeline": [
{
"lang": "en",
"time": "2024-02-12T00:00:00.000Z",
"value": "CVE-2023-43770 added to CISA KEV"
}
],
"title": "CISA ADP Vulnrichment"
}
],
"cna": {
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{
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"vendor": "n/a",
"versions": [
{
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]
}
],
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{
"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",
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"type": "text"
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]
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],
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},
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},
{
"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": [
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],
"url": "https://lists.debian.org/debian-lts-announce/2023/09/msg00024.html"
}
]
}
},
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"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"
}
}
}
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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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The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the
vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base
model, served locally by ML-Gateway.
They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.
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Related by attack behaviour
Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.
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