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CVE-2020-13965 (GCVE-0-2020-13965)

Vulnerability from cvelistv5 – Published: 2020-06-09 02:45 – Updated: 2025-10-21 23:35
VLAI CISA Previdian
Summary
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.
Severity
6.3 (Medium)
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:L
SSVC
Exploitation: active Automatable: no Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2024-06-26 15:33 UTC
CWE
  • n/a
  • CWE-80 - Improper Neutralization of Script-Related HTML Tags in a Web Page (Basic XSS)
Assigner
References
Impacted products
Vendor Product Version CPE status
roundcube webmail Affected: 0 , < 1.3.12 (custom)
    cpe:2.3:a:roundcube:webmail:-:*:*:*:*:*:*:*
Create a notification for this product.
roundcube webmail Affected: 1.4.0 , < 1.4.5 (custom)
    cpe:2.3:a:roundcube:webmail:1.4.0:*:*:*:*:*:*:*
Create a notification for this product.
CISA
Known Exploited Vulnerability - GCVE BCP-07 Compliant
KEV entry ID: 9b0268e6-3166-4783-9370-f76ecdecece7

Vulnerability ID: CVE-2020-13965

Status: Confirmed

Status Updated: 2024-06-26 00:00 UTC

Exploited: Yes

Timestamps
First Seen: 2024-06-26
Asserted: 2024-06-26
Scope
Notes: KEV entry: Roundcube Webmail Cross-Site Scripting (XSS) Vulnerability | Affected: Roundcube / Webmail | Description: Roundcube Webmail contains a cross-site scripting (XSS) vulnerability that allows a remote attacker to manipulate data via a malicious XML attachment. | Required action: Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable. | Due date: 2024-07-17 | Known ransomware campaign use (KEV): Unknown | Notes (KEV): https://roundcube.net/news/2020/06/02/security-updates-1.4.5-and-1.3.12; https://nvd.nist.gov/vuln/detail/CVE-2020-13965
Evidence

Type: Vendor Report

Signal: Successful Exploitation

Confidence: 80%

Source: cisa-kev

Details
Cwes CWE-80
Feed CISA Known Exploited Vulnerabilities Catalog
Product Webmail
Due Date 2024-07-17
Date Added 2024-06-26
Vendorproject Roundcube
Vulnerabilityname Roundcube Webmail 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: 719cf835-e7e3-406c-aade-b6e8bd525d50

Vulnerability ID: CVE-2020-13965

Status: Confirmed

Status Updated: 2024-06-26 00:00 UTC

Exploited: Yes

Timestamps
First Seen: 2024-06-26
Asserted: 2024-06-26
Scope
Notes: KEVIntel entry: 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... | Affected: 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 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...
Vendor Roundcube
Product Webmail
Added Date 2024-06-26T00:00:00.000Z
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
Show details on NVD website
To clipboard 

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    "redhat_vex": {
      "current_release_date": "2025-11-21T14:43:17+00:00",
      "cve": "CVE-2020-13965",
      "id": "CVE-2020-13965",
      "initial_release_date": "2020-06-09T00:00:00+00:00",
      "product_status:known_not_affected": "1",
      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "roundcubemail: XSS via a malicious XML attachment",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2020/cve-2020-13965.json",
      "version": "3"
    },
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      "cveMetadata": "{\"cveId\": \"CVE-2020-13965\", \"state\": \"PUBLISHED\", \"dateUpdated\": \"2025-10-21T23:35:42.715Z\", \"dateReserved\": \"2020-06-09T00:00:00.000Z\", \"assignerOrgId\": \"8254265b-2729-46b6-b9e3-3dfca2d5bfca\", \"datePublished\": \"2020-06-09T02:45:24.000Z\", \"assignerShortName\": \"mitre\"}",
      "dataType": "CVE_RECORD",
      "dataVersion": "5.1"
    }
  }
}



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Tags
Taxonomy of the tags.





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.


Detection rules are retrieved from Rulezet.


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.