CVE-2020-13965
Confirmed PUBLISHEDAn issue was discovered in Roundcube Webmail before 1.3.12 and 1.4.x before 1.4.5. There is XSS via a malicious XML attachment because text/xml is...
Recommended Action
Prioritize remediation. Validate affected assets and apply vendor fixes on an accelerated timeline.
At a Glance
An issue was discovered in Roundcube Webmail before 1.3.12 and 1.4.x before 1.4.5. There is XSS via a malicious XML attachment because text/xml is among the allowed types for a preview.
- CVE Published
- Jun 09, 2020
- Exploitation Reported
- Jun 26, 2024
- CVSS
- 6.1 Medium
- EPSS
- —
Affected Versions
| Vendor | Product | Version | Status |
|---|---|---|---|
| roundcube |
webmail
|
0 to < 1.3.12 |
Affected |
| roundcube |
webmail
|
1.4.0 to < 1.4.5 |
Affected |
| n/a |
n/a
|
n/a |
Affected |
CVE References
- DSA-4700 debian.org · Vendor Advisory https://www.debian.org/security/2020/dsa-4700
- FEDORA-2020-2a1a6a8432 lists.fedoraproject.org · Vendor Advisory https://lists.fedoraproject.org/archives/list/package-announce%40list...
- FEDORA-2020-aeffd92b77 lists.fedoraproject.org · Vendor Advisory https://lists.fedoraproject.org/archives/list/package-announce%40list...
- GitHub — roundcube/roundcubemail github.com · CVE Record https://github.com/roundcube/roundcubemail/releases/tag/1.4.5
- GitHub — roundcube/roundcubemail github.com · CVE Record https://github.com/roundcube/roundcubemail/releases/tag/1.3.12
Show 4 more references
- GitHub — roundcube/roundcubemail github.com · CVE Record https://github.com/roundcube/roundcubemail/commit/884eb611627ef2bd5a2...
- GitHub — roundcube/roundcubemail github.com · CVE Record https://github.com/roundcube/roundcubemail/compare/1.4.4...1.4.5
- roundcube.net/news/2020/06/02/security-updates-1.4.5-and-1... roundcube.net · CVE Record https://roundcube.net/news/2020/06/02/security-updates-1.4.5-and-1.3.12
- GitHub — DrunkenShells/Disclosures github.com · CVE Record https://github.com/DrunkenShells/Disclosures/tree/master/CVE-2020-139...
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 | 2024-06-26 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
AV:N/AC:M/Au:N/C:N/I:P/A:N
Exploitation Status
Exploited in the wild
Recorded 2024-06-26 00:00:00 UTC · CISA
Proof of concept available
Recorded 2024-04-13 15:49:04 UTC · GitHub
Weaknesses (CWE)
-
Improper Neutralization of Script-Related HTML Tags in a Web Page (Basic XSS)
Scanner Integrations
| Scanner | Reference | Detected |
|---|---|---|
| Nessus | https://www.tenable.com/plugins/nessus/183111 | Jun 02, 2025 |
Potential Proof of Concepts
These PoCs are unverified and could contain malware. Use at your own risk.
github · Created 2024-04-13 15:49:04 UTC · 0 stars
CVE-2020-13965: Cross-Site Scripting via Malicious XML Attachment in Roundcube Webmail
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 about 2 years ago00:00 UTC · about 2 years ago
Added to CISA KEV
Listed in the CISA Known Exploited Vulnerabilities catalog
-
15:49 UTC over 2 years ago15:49 UTC · over 2 years ago
Public PoC available
Public proof-of-concept code published
-
02:45 UTC about 6 years ago02:45 UTC · about 6 years ago
CVE published
Vulnerability disclosed publicly
-
00:00 UTC about 6 years ago00:00 UTC · about 6 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-2020-13965
{
"cve_id": "CVE-2020-13965",
"title": "An issue was discovered in Roundcube Webmail before 1.3.12 and 1.4.x before 1...",
"affected_vendor": "Roundcube",
"affected_product": "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": [ "..." ]
}