CVE-2023-43770
Confirmed PUBLISHEDRoundcube 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...
Recommended Action
Prioritize remediation. Validate affected assets and apply vendor fixes on an accelerated timeline.
At a Glance
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.
- CVE Published
- Sep 22, 2023
- Exploitation Reported
- Feb 12, 2024
- CVSS
- 6.1 Medium
- EPSS
- —
Affected Versions
| Vendor | Product | Version | Status |
|---|---|---|---|
| roundcube |
webmail
|
0 to < 1.4.14 |
Affected |
| roundcube |
webmail
|
1.5.0 to < 1.5.4 |
Affected |
| roundcube |
webmail
|
1.6.0 to < 1.6.3 |
Affected |
| debian |
debian_linux
|
10 |
Affected |
| n/a |
n/a
|
n/a |
Affected |
CVE References
- [debian-lts-announce] 20230922 [SECURITY] [DLA 3577-1] roundcube security update lists.debian.org · Mailing List https://lists.debian.org/debian-lts-announce/2023/09/msg00024.html
- GitHub — roundcube/roundcubemail github.com · CVE Record https://github.com/roundcube/roundcubemail/commit/e92ec206a886461245e...
- roundcube.net/news/2023/09/15/security-update-1.6.3-released roundcube.net · CVE Record https://roundcube.net/news/2023/09/15/security-update-1.6.3-released
Recommended Actions
- Prioritize remediation. Validate affected assets and apply vendor fixes on an accelerated timeline.
- Check enrichment artifacts for scanner coverage and available PoCs before rolling remediation validation.
- Use the Pro API to automate enrichment, telemetry, and workflow delivery for VM, SOC, and CTI pipelines.
Known Exploited Vulnerability Sources
Catalogues that list this CVE as a known exploited vulnerability.
Per-source evidence links for KEV attestations are available through the KEVIntel Pro API.
Learn about Pro API access| Source | Added |
|---|---|
| CISA First | 2024-02-12 00:00 UTC |
No detection artifacts or sensor request patterns are available for this CVE yet.
Check back as sensor telemetry and scanner integrations are updated.
Virtual Patch
Compensating WAF rules to help reduce exposure to this CVE. Rule content and deployable vendor exports are available with KEVIntel Enterprise.
KEVIntel does not currently have a virtual patch for this CVE. When available, KEVIntel virtual patches ship as deployable ModSecurity, Cloudflare, and AWS WAF rules.
Enterprise feature. Virtual patch rule content and deployable vendor exports (ModSecurity, Cloudflare, AWS WAF) are available to KEVIntel Enterprise users.
CVSS Scores
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
Exploitation Status
Exploited in the wild
Recorded 2024-02-12 00:00:00 UTC · CISA
Proof of concept available
Recorded 2023-09-27 17:08:23 UTC · GitHub
Weaknesses (CWE)
-
Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
Scanner Integrations
| Scanner | Reference | Detected |
|---|---|---|
| Nessus | https://www.tenable.com/plugins/nessus/114553 | Jun 02, 2025 |
Potential Proof of Concepts
These PoCs are unverified and could contain malware. Use at your own risk.
github · Created 2023-09-28 13:43:25 UTC · 3 stars
PoC for Stored XSS (CVE-2023-43770) Vulnerability
github · Created 2023-09-27 17:08:23 UTC · 33 stars
A Proof-Of-Concept for the CVE-2023-43770 vulnerability.
Timeline
Key exploitation, disclosure, scanner coverage, and KEV attestation events for this CVE.
-
09:26 UTC about 1 year ago09:26 UTC · about 1 year ago
Nessus plugin available
Scanner coverage available
-
00:00 UTC over 2 years ago00:00 UTC · over 2 years ago
Added to CISA KEV
Listed in the CISA Known Exploited Vulnerabilities catalog
-
17:08 UTC almost 3 years ago17:08 UTC · almost 3 years ago
Public PoC available
Public proof-of-concept code published
-
00:00 UTC almost 3 years ago00:00 UTC · almost 3 years ago
CVE published
Vulnerability disclosed publicly
-
00:00 UTC almost 3 years ago00:00 UTC · almost 3 years ago
CVE ID reserved
Identifier reserved by the CNA
Automate This Intelligence with the Pro API
Confidence scoring, exploit status, sensor telemetry, PoCs, scanner integrations, mentions, and tags are available programmatically for VM, SOC, and CTI workflows.
Pro API Example
GET /api/v2/pro/kevs/CVE-2023-43770
{
"cve_id": "CVE-2023-43770",
"title": "Roundcube before 1.4.14, 1.5.x before 1.5.4, and 1.6.x before 1.6.3 allows XS...",
"affected_vendor": "Roundcube",
"affected_product": "Roundcube Webmail",
"affected_versions": [
{ "vendor": "...", "product": "...", "status": "affected", "display_label": "..." }
],
"confidence": "Confirmed",
"cvss_score": 6.1,
"epss_score": null,
"exploit_status": {
"exploited_in_the_wild": true,
"active_exploitation_observed": false
},
"sensor_telemetry": { "...": "Pro API fields" },
"proof_of_concepts": [ "..." ],
"scanner_integrations": [ "..." ]
}