CVE-2023-5631 (GCVE-0-2023-5631)
Vulnerability from cvelistv5 – Published: 2023-10-18 14:51 – Updated: 2025-10-21 23:05Title
Stored XSS vulnerability in Roundcube
Summary
Roundcube before 1.4.15, 1.5.x before 1.5.5, and 1.6.x before 1.6.4 allows stored XSS via an HTML e-mail message with a crafted SVG document because of program/lib/Roundcube/rcube_washtml.php behavior. This could allow a remote attacker
to load arbitrary JavaScript code.
Severity
6.1 (Medium)
SSVC
Exploitation: active
Automatable: no
Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2023-11-15 16:39 UTC
CWE
- CWE-79 - Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
Assigner
References
16 references
Impacted products
1 product
| Vendor | Product | Version | CPE status | |
|---|---|---|---|---|
| Roundcube | Roundcubemail |
Affected:
1.6.0 , < 1.6.3
(semver)
Affected: 1.5.0 , < 1.5.4 (semver) Affected: 1.4.0 , < 1.5.14 (semver) Unaffected: 1.6.4 Unaffected: 1.5.5 Unaffected: 1.5.15 |
guessed |
CISA
Known Exploited Vulnerability - GCVE BCP-07 Compliant
KEV entry ID: 72b2c094-241b-4afb-89a0-01810c8aa47b
Exploited: Yes
Timestamps
First Seen: 2023-10-26
Asserted: 2023-10-26
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 allows a remote attacker to run malicious JavaScript code. | Required action: Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable. | Due date: 2023-11-16 | Known ransomware campaign use (KEV): Unknown | Notes (KEV): https://roundcube.net/news/2023/10/16/security-update-1.6.4-released, https://roundcube.net/news/2023/10/16/security-updates-1.5.5-and-1.4.15 ; https://nvd.nist.gov/vuln/detail/CVE-2023-5631
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 | 2023-11-16 |
| Date Added | 2023-10-26 |
| 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: 0540f4b4-d18f-42ac-a0c5-bed427623e2e
Exploited: Yes
Timestamps
First Seen: 2023-10-26
Asserted: 2023-10-26
Scope
Notes: KEVIntel entry: Stored XSS vulnerability in Roundcube | Affected: Roundcube / Roundcubemail | 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 | Stored XSS vulnerability in Roundcube |
| Vendor | Roundcube |
| Product | Roundcubemail |
| Added Date | 2023-10-26T00:00:00.000Z |
| 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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}
],
"title": "CISA ADP Vulnrichment"
}
],
"cna": {
"affected": [
{
"defaultStatus": "unaffected",
"product": "Roundcubemail",
"repo": "https://github.com/roundcube/roundcubemail",
"vendor": "Roundcube",
"versions": [
{
"lessThan": "1.6.3",
"status": "affected",
"version": "1.6.0",
"versionType": "semver"
},
{
"lessThan": "1.5.4",
"status": "affected",
"version": "1.5.0",
"versionType": "semver"
},
{
"lessThan": "1.5.14",
"status": "affected",
"version": "1.4.0",
"versionType": "semver"
},
{
"status": "unaffected",
"version": "1.6.4"
},
{
"status": "unaffected",
"version": "1.5.5"
},
{
"status": "unaffected",
"version": "1.5.15"
}
]
}
],
"credits": [
{
"lang": "en",
"type": "finder",
"user": "00000000-0000-4000-9000-000000000000",
"value": "Matthieu Faou"
},
{
"lang": "en",
"type": "finder",
"user": "00000000-0000-4000-9000-000000000000",
"value": "Denys Klymenko"
},
{
"lang": "en",
"type": "remediation developer",
"user": "00000000-0000-4000-9000-000000000000",
"value": "Aleksander Machniak"
}
],
"descriptions": [
{
"lang": "en",
"supportingMedia": [
{
"base64": false,
"type": "text/html",
"value": "\u003cdiv\u003eRoundcube before 1.4.15, 1.5.x before 1.5.5, and 1.6.x before 1.6.4 allows stored XSS via an HTML e-mail message with a crafted SVG document because of program/lib/Roundcube/rcube_washtml.php behavior. This could allow a remote attacker\n\nto load arbitrary JavaScript code.\u003cbr\u003e\u003c/div\u003e\u003cdiv\u003e\u003cbr\u003e\u003c/div\u003e"
}
],
"value": "Roundcube before 1.4.15, 1.5.x before 1.5.5, and 1.6.x before 1.6.4 allows stored XSS via an HTML e-mail message with a crafted SVG document because of program/lib/Roundcube/rcube_washtml.php behavior. This could allow a remote attacker\n\nto load arbitrary JavaScript code."
}
],
"exploits": [
{
"lang": "en",
"supportingMedia": [
{
"base64": false,
"type": "text/html",
"value": "Actively used in the wild.\n\n\u003cbr\u003e"
}
],
"value": "Actively used in the wild."
}
],
"impacts": [
{
"capecId": "CAPEC-592",
"descriptions": [
{
"lang": "en",
"value": "CAPEC-592 Stored XSS"
}
]
}
],
"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"
},
"format": "CVSS",
"scenarios": [
{
"lang": "en",
"value": "GENERAL"
}
]
}
],
"problemTypes": [
{
"descriptions": [
{
"cweId": "CWE-79",
"description": "CWE-79 Improper Neutralization of Input During Web Page Generation (\u0027Cross-site Scripting\u0027)",
"lang": "en",
"type": "CWE"
}
]
}
],
"providerMetadata": {
"dateUpdated": "2023-11-17T15:06:13.428Z",
"orgId": "4a9b9929-2450-4021-b7b9-469a0255b215",
"shortName": "ESET"
},
"references": [
{
"url": "https://github.com/roundcube/roundcubemail/commit/6ee6e7ae301e165e2b2cb703edf75552e5376613"
},
{
"url": "https://github.com/roundcube/roundcubemail/releases/tag/1.6.4"
},
{
"url": "https://github.com/roundcube/roundcubemail/releases/tag/1.5.5"
},
{
"url": "https://github.com/roundcube/roundcubemail/releases/tag/1.4.15"
},
{
"url": "https://github.com/roundcube/roundcubemail/issues/9168"
},
{
"url": "https://roundcube.net/news/2023/10/16/security-update-1.6.4-released"
},
{
"url": "https://github.com/roundcube/roundcubemail/commit/41756cc3331b495cc0b71886984474dc529dd31d"
},
{
"url": "https://roundcube.net/news/2023/10/16/security-updates-1.5.5-and-1.4.15"
},
{
"url": "https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=1054079"
},
{
"url": "https://www.debian.org/security/2023/dsa-5531"
},
{
"url": "https://lists.debian.org/debian-lts-announce/2023/10/msg00035.html"
},
{
"url": "http://www.openwall.com/lists/oss-security/2023/11/01/1"
},
{
"url": "http://www.openwall.com/lists/oss-security/2023/11/01/3"
},
{
"url": "https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/LK67Q46OIEGJCRQUBHKLH3IIJTBNGGX4/"
},
{
"url": "http://www.openwall.com/lists/oss-security/2023/11/17/2"
}
],
"source": {
"discovery": "EXTERNAL"
},
"title": "Stored XSS vulnerability in Roundcube",
"x_generator": {
"engine": "Vulnogram 0.1.0-dev"
}
}
},
"cveMetadata": {
"assignerOrgId": "4a9b9929-2450-4021-b7b9-469a0255b215",
"assignerShortName": "ESET",
"cveId": "CVE-2023-5631",
"datePublished": "2023-10-18T14:51:18.443Z",
"dateReserved": "2023-10-18T06:50:57.504Z",
"dateUpdated": "2025-10-21T23:05:34.074Z",
"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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