vulntracker.iovulntracker.io
© 2026 vulntracker.io

CVE-2020-35730

MEDIUM
6.1
CVSS Score
Published: December 28, 2020 at 07:37 PM UTC
Updated: June 17, 2026 at 03:14 AM UTC
3 products affected across 3 vendorsDebian LinuxFedoraWebmail

Using N/A by N/A?

Get instant alerts when new vulnerabilities affect N/A - before attackers find them.

Real-time alertsTrack your software stackFree plan available
Start FreeSign In
Severity
MEDIUM6.1
Exploitation
CISA KEV
Exploit prediction
EPSS 33%
SSVC
Active

Actively Exploited

CISA Known Exploited Vulnerabilities (KEV) Catalog

EPSS Score32.9%

EPSS (Exploit Prediction Scoring System) estimates a 32.9% chance this CVE is exploited in the wild within the next 30 days — higher than 98% of all CVEs. It complements CVSS: a high EPSS on a mid-severity CVE can still be urgent.

Roundcube Webmail contains a cross-site scripting (XSS) vulnerability that allows an attacker to send a plain text e-mail message with Javascript in a link reference element that is mishandled by linkref_addinindex in rcube_string_replacer.php.

Required Action
Apply updates per vendor instructions.
Ransomware Use
Unknown
Added to KEV
Jun 22, 2023
Remediation Due
Jul 13, 2023
1205 days overdue
Notes
https://roundcube.net/news/2020/12/27/security-updates-1.4.10-1.3.16-and-1.2.13
https://nvd.nist.gov/vuln/detail/CVE-2020-35730

Description

An XSS issue was discovered in Roundcube Webmail before 1.2.13, 1.3.x before 1.3.16, and 1.4.x before 1.4.10. The attacker can send a plain text e-mail message, with JavaScript in a link reference element that is mishandled by linkref_addindex in rcube_string_replacer.php.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

Debian Linux· Debiandrupal
95%
9.0
Fedora· Fedora Projectrpm
95%
3233
Webmail· Roundcube
95%
v < 1.2.131.3.0 ≤ v < 1.3.161.4 ≤ v < 1.4.10
Affected range stops below 1.2.13, so it looks safe — our inference, not a vendor statement
Affected range stops below 1.3.16, so it looks safe — our inference, not a vendor statement
Affected range stops below 1.4.10, so it looks safe — our inference, not a vendor statement

References (10)

x_refsource_CONFIRMIssue TrackingMailing List
Source: [email protected]
https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=978491
x_refsource_CONFIRMPatch
Source: [email protected]
https://github.com/roundcube/roundcubemail/compare/1.4.9...1.4.10
x_refsource_CONFIRMRelease Notes
Source: [email protected]
https://github.com/roundcube/roundcubemail/releases/tag/1.2.13
x_refsource_CONFIRMRelease Notes
Source: [email protected]
https://github.com/roundcube/roundcubemail/releases/tag/1.3.16
x_refsource_CONFIRMRelease Notes
Source: [email protected]
https://github.com/roundcube/roundcubemail/releases/tag/1.4.10
Vendor Advisoryx_refsource_FEDORAMailing ListRelease Notes
Source: [email protected]
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/HCEU4BM5WGIDJWP6Z4PCH62ZMH57QYM2/
Vendor Advisoryx_refsource_FEDORAMailing ListRelease Notes
Source: [email protected]
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/HMLIZWKMTRCLU7KZLEQHELS4INXJ7X5Q/
x_refsource_MISCProduct
Source: [email protected]
https://roundcube.net/download/

SSVC — Action Prioritization

SSVCActiveNot automatablePartial impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

6.1MEDIUMCISA-ADP
Attack Vector
NETWORK
Complexity
LOW
Privileges
NONE
User Interaction
REQUIRED
Scope
CHANGED
Confidentiality
LOW
Integrity
LOW
Availability
NONE
Vector?

Quick Info

StatusANALYZED
CWE
CWE-79

Get alerted

Stop reading CVE feeds looking for your own stack

Track the products you run and VulnTracker tells you when a new CVE affects them — with what is known about fixing it, and nothing about the rest.

Create accountSign in
Free plan, no card