CVE-2020-35730

Exploitation

Exploited in the wild. Listed in the CISA Known Exploited Vulnerabilities catalog on 2023-06-22. Federal remediation due 2023-07-13.

SSVC decision

• ExploitationactiveCISA reports credible evidence of active exploitation.
• AutomatablenoAt least one step from reconnaissance to exploitation cannot be reliably automated.
• Technical ImpactpartialSuccessful exploitation gives limited control of the vulnerable component.

CISA publishes the decision points, not a final SSVC decision. The decision also depends on mission and well-being impact, which is a property of your deployment rather than of the vulnerability.

EPSS probability

32.69% probability of exploitation activity in the next 30 days.

EPSS percentile

Ranks above 98.2% of scored records. A rank, not a probability.

NVD base score

6.1 (CVSS v3.x), scored by the NVD independently of the CNA.

NVD CVSS vector

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

NVD analysis status

Analyzed. NVD last modified this record on 2026-06-17.

Red Hat severity

No Red Hat rating. Red Hat rates the CVEs that affect its products.

Exploit-prediction scores from FIRST. Independent scoring and analysis status from the NVD. Vendor severity from Red Hat. Exploitation assessment and catalog membership from CISA.

Published

2020-12-28 19:37Z5 YR AGO

Last updated

2025-10-21 23:35Z10 MO AGO

Reserved

2020-12-27

Assigning CNA

mitre

Record state

PUBLISHED

Severity

Medium (CVSS 6.1)

CNA CVSS vector

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

Weaknesses

• CWE-79Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')Base

Data version

5.1

Document digest

704a37021b690382e6d75d5ba48f5b2a88398bd2a60be41395fb2448e7d0ef48

• roundcube.nethttps://roundcube.net/download/x_refsource_MISC
• github.comhttps://github.com/roundcube/roundcubemail/compare/1.4.9...1.4.10x_refsource_CONFIRM
• bugs.debian.orghttps://bugs.debian.org/cgi-bin/bugreport.cgi?bug=978491x_refsource_CONFIRM
• www.alexbirnberg.comhttps://www.alexbirnberg.com/roundcube-xss.htmlx_refsource_MISC
• github.comhttps://github.com/roundcube/roundcubemail/releases/tag/1.4.10x_refsource_CONFIRM
• github.comhttps://github.com/roundcube/roundcubemail/releases/tag/1.3.16x_refsource_CONFIRM
• github.comhttps://github.com/roundcube/roundcubemail/releases/tag/1.2.13x_refsource_CONFIRM
• lists.fedoraproject.orgFEDORA-2021-2cb0643316https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/HMLIZWKMTRCLU7KZLEQHELS4INXJ7X5Q/vendor-advisoryx_refsource_FEDORA
• lists.fedoraproject.orgFEDORA-2021-73359af51chttps://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/HCEU4BM5WGIDJWP6Z4PCH62ZMH57QYM2/vendor-advisoryx_refsource_FEDORA
• www.cisa.govhttps://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2020-35730government-resource