CVE-2020-13965Roundcube Webmail Cross-Site Scripting (XSS) Vulnerability

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.

6.3 MEDIUMEPSS 76.59%⚡ Known Exploited (CISA KEV)NVD: Analyzed

Last updated: 2026-06-17 02:54 UTC

OverviewCVSS details

6.3MEDIUMCVSS 3.1

Score source: CISA-ADP
NVD status: Analyzed
Published: Jun 9, 2020
Assigner: mitre

Affected

webmail (roundcube)

Versions: before 1.3.12 · 1.4.0 before 1.4.5
Fixed in: 1.3.12, 1.4.5

+2 more products →

Exploitation

Public exploit: Yes · 1 reference
CISA KEV: Listed · Jun 26, 2024
KEV due date: Jul 17, 2024
Ransomware use: Unknown
SSVC: Exploitation active · Automatable no · Impact partial

EPSS · FIRST, scored Nov 7

76.59%chance of exploitation in 30 days

Higher than 99.54% of CVEs

CVSS 3.1 · CISA-ADP

6.3Medium

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:L

Attack vector: Network
Attack complexity: Low
Privileges required: None
User interaction: Required
Scope: Unchanged
Confidentiality impact: Low
Integrity impact: Low
Availability impact: Low

CVSS 3.1 · NVD

6.1Medium

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N

Attack vector: Network
Attack complexity: Low
Privileges required: None
User interaction: Required
Scope: Changed
Confidentiality impact: Low
Integrity impact: Low
Availability impact: None

CVSS 2.0 · NVD

4.3Medium

AV:N/AC:M/Au:N/C:N/I:P/A:N

Attack vector: Network
Attack complexity: Medium
Authentication: None
Confidentiality impact: None
Integrity impact: Partial
Availability impact: None

NVD status: Analyzed

Overview Affected Products References

NVD CVE.org

Overview

Severity

Score	Severity	Version	Vector String
6.3	MEDIUM	3.1CISA-ADP	CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:L
6.1	MEDIUM	3.1NVD	CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
4.3	MEDIUM	2.0NVD	AV:N/AC:M/Au:N/C:N/I:P/A:N

CISA required action

⚡ Known exploited · remediation due Jul 17, 2024

Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable.

Details

CVE ID: CVE-2020-13965
Status: Analyzed
Assigner (CNA): mitre
Published: Jun 9, 2020
Last modified: 2026-06-17 02:54 UTC
Weaknesses: CWE-79
CWE-80

Sources

Refreshed hourly from the sources above. Last fetched 2026-11-08 13:16 UTC.