XSS in Roundcube Webmail
CVE-2020-13965
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.
Vulnerability class: XSS (Cross-Site Scripting)
Published · last modified .
CVSS v3 metric
CVSS v3 base score 6.1 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N.
EPSS exploit prediction
EPSS: 0.766 (99.5th percentile), scored .
High probability of exploitation in the next 30 days — patch promptly. 100th percentile — 99.5% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.766 · newest: 0.766 · change: 0.000
Affected products
- Roundcube Webmail
- Debian Linux — versions 9.0, 10.0
- Fedoraproject Fedora — versions 31, 32
Weakness classification (CWE)
CISA KEV (Known Exploited Vulnerabilities)
This CVE is on the CISA KEV catalog, added on . CISA KEV inclusion means CISA has confirmed in-the-wild exploitation; US federal agencies are required to remediate within a published due date.
BOD 22-01 due date: .
Required action: Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable.
Public proof-of-concept exploits
References
- github.com/roundcube/roundcubemail/releases/tag/1.4.5 (Release Notes)
- github.com/roundcube/roundcubemail/releases/tag/1.3.12 (Release Notes)
- github.com/roundcube/roundcubemail/commit/884eb611627ef2bd5a2e20e02009ebb1eceec… (Patch, Third Party Advisory)
- github.com/roundcube/roundcubemail/compare/1.4.4...1.4.5 (Patch)
- roundcube.net/news/2020/06/02/security-updates-1.4.5-and-1.3.12 (Vendor Advisory)
- www.debian.org/security/2020/dsa-4700 (vendor-advisory, Third Party Advisory)
- lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/… (vendor-advisory, Mailing List)
- lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/… (vendor-advisory, Mailing List)
- github.com/DrunkenShells/Disclosures/tree/master/CVE-2020-13965-Cross Site-Scri… (Exploit, Third Party Advisory)
- 134c704f-9b21-4f2e-91b3-4a467353bcc0 (US Government Resource)
Frequently asked questions
- What is CVE-2020-13965?
- CVE-2020-13965 is a medium-severity vulnerability in Roundcube Webmail, classified under Cross-site Scripting. CVSS score: 6.1/10. Published 2020-06-09.
- How severe is CVE-2020-13965?
- Medium severity. CVSS v3 base score is 6.1 out of 10.
- Is CVE-2020-13965 known to be exploited?
- Yes. CVE-2020-13965 is listed in the CISA Known Exploited Vulnerabilities catalog (added 2024-06-26), indicating it is being actively exploited. 3 public proof-of-concept repositories are indexed.