What is CVE-2020-12625?

CVE-2020-12625 is a medium-severity vulnerability in Roundcube Webmail, classified under Cross-site Scripting. CVSS score: 6.1/10. Published 2020-05-04.

How severe is CVE-2020-12625?

Medium severity. CVSS v3 base score is 6.1 out of 10.

Is CVE-2020-12625 known to be exploited?

3 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.

XSS in Roundcube Webmail

CVE-2020-12625

An issue was discovered in Roundcube Webmail before 1.4.4. There is a cross-site scripting (XSS) vulnerability in rcube_washtml.php because JavaScript code can occur in the CDATA of an HTML message.

Vulnerability class: XSS (Cross-Site Scripting)

Published 2020-05-04 · last modified 2026-06-17.

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: 0.028 (85.8th percentile), scored 2026-09-29.

Low probability of exploitation in the next 30 days, but still tracked. 86th percentile — 85.8% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.028 · newest: 0.028 · change: 0.000

Affected products

Roundcube Webmail
Debian Linux — versions 9.0, 10.0
openSUSE Backports Sle — versions 15.0
openSUSE Leap — versions 15.1, 15.2

Weakness classification (CWE)

CWE-79 — Cross-site Scripting

Public proof-of-concept exploits

References

github.com/roundcube/roundcubemail/commit/87e4cd0cf2c550e77586860b94e5c75d2b768… (Patch, Third Party Advisory)
github.com/roundcube/roundcubemail/releases/tag/1.4.4 (Third Party Advisory)
github.com/roundcube/roundcubemail/compare/1.4.3...1.4.4 (Patch, Third Party Advisory)
www.debian.org/security/2020/dsa-4674 (vendor-advisory, Third Party Advisory)
github.com/DrunkenShells/Disclosures/tree/master/CVE-2020-12625-Cross Site-Scri… (Exploit, Third Party Advisory)
security.gentoo.org/glsa/202007-41 (vendor-advisory, Third Party Advisory)
lists.opensuse.org/opensuse-security-announce/2020-09/msg00083.html (vendor-advisory, Third Party Advisory)

Frequently asked questions

What is CVE-2020-12625?: CVE-2020-12625 is a medium-severity vulnerability in Roundcube Webmail, classified under Cross-site Scripting. CVSS score: 6.1/10. Published 2020-05-04.
How severe is CVE-2020-12625?: Medium severity. CVSS v3 base score is 6.1 out of 10.
Is CVE-2020-12625 known to be exploited?: 3 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.