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Fencer Vulns
medium 4.3

CVE-2007-6321 json

Cross-site scripting (XSS) vulnerability in RoundCube webmail 0.1rc2, 2007-12-09, and earlier versions, when using Internet Explorer, allow…

published 2007-12-12 18 y ago modified 2026-06-16 4 mo ago also EUVD-2007-6288

cvss
4.3
version 2.0, NVD
cisa kev
Not listed
not in CISA's catalog
epss
5.4%
EPSS 5.4% chance of exploitation in 30 days, percentile 92%
public exploits
1
Exploit-DB

Summary

Cross-site scripting (XSS) vulnerability in RoundCube webmail 0.1rc2, 2007-12-09, and earlier versions, when using Internet Explorer, allows remote attackers to inject arbitrary web script or HTML via style sheets containing expression commands.

Patch / fix

  • roundcube Debian 14, Debian 13, Debian 12 0.1~rc2-6

debian advisories DEBIAN-CVE-2007-6321

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2007-6321 updated

roundcubemail: XSS vulnerability

  • Red Hat All currently supported Red Hat products
    not affected: vulnerable code not present

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

Timeline

  1. First public exploit (EDB-30877)
  2. Published

Exploit prediction

5.44% chance of exploitation in the next 30 days, higher than 92% of all scored CVEs (FIRST EPSS, 2026-11-08).

Exploits and checks

  • EDB-30877 Roundcube Webmail 0.1 - CSS Expression Input Validation webapps, 2007-11-10
  • trac.roundcube.net http://trac.roundcube.net/ticket/1484701 referenced PoC, tagged "exploit" by a source, unverified
  • securityreason.com http://securityreason.com/securityalert/3435 referenced PoC, tagged "exploit" by a source, unverified
  • securityfocus.com http://www.securityfocus.com/bid/26800 referenced PoC, tagged "exploit" by a source, unverified
  • openmya.hacker.jp http://openmya.hacker.jp/hasegawa/security/expression.txt referenced PoC, tagged "exploit" by a source, unverified

CVSS scores

assigned by version score vector
NVD 2.0 4.3 AV:N/AC:M/Au:N/C:N/I:P/A:N

Classification

Weakness
  • CWE-79 Improper Neutralization of Input During Web Page Generation

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.