CASCACascade Atlas

Evidence dossier

CVE-2020-13965

CVE-2020-13965

68.3–88.3Priority evidence range
As known Jul 19, 2026, 5:00 AM UTCgen-56ccdaf9

Normalized restatement

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.

State
PUBLISHED
Published
Jun 9, 2020
Updated
Oct 21, 2025
Evidence coverage
72%
CISA KEVCatalog member

Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable.

FIRST EPSS76.60%

2026-07-18 · v2026.06.15 · percentile 99.5%

Source stateConflict visible

Distinct CVSS assessments remain side by side; none are averaged.

Source comparison

Who said what

CISA-ADPindependent enrichment
container

CISA ADP Vulnrichment

CVEderivative copy
container

CVE Program Container

mitreoriginal assertion
container

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.

CISA KEVoriginal assertion
observed_exploitation

Roundcube Webmail Cross-Site Scripting (XSS) Vulnerability

FIRST EPSSoriginal assertion
model_probability

Probability 0.765960000000; percentile 0.994900000000

Applicability

Cited product scope

Trace impact →
n/an/a
[{"status": "affected", "version": "n/a"}]unknown
roundcubewebmail
[{"status": "affected", "version": "0", "lessThan": "1.3.12", "versionType": "custom"}]unknown
roundcubewebmail
[{"status": "affected", "version": "1.4.0", "lessThan": "1.4.5", "versionType": "custom"}]unknown
Unknown vendorUnknown product
cpe:2.3:a:roundcube:webmail:*:*:*:*:*:*:*:*; end excluding 1.3.12supported
Unknown vendorUnknown product
cpe:2.3:a:roundcube:webmail:*:*:*:*:*:*:*:*; start including 1.4.0; end excluding 1.4.5supported
Unknown vendorUnknown product
cpe:2.3:o:debian:debian_linux:10.0:*:*:*:*:*:*:*supported
Unknown vendorUnknown product
cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:*supported
Unknown vendorUnknown product
cpe:2.3:o:fedoraproject:fedora:31:*:*:*:*:*:*:*supported
Unknown vendorUnknown product
cpe:2.3:o:fedoraproject:fedora:32:*:*:*:*:*:*:*supported

Assessments

CVSS by origin

6.1
nvd@nist.govCVSS 3.1 · role PrimaryCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
4.3
nvd@nist.govCVSS 2.0 · role PrimaryAV:N/AC:M/Au:N/C:N/I:P/A:N
6.3
134c704f-9b21-4f2e-91b3-4a467353bcc0CVSS 3.1 · role SecondaryCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:L
6.3
CISA-ADPCVSS 3.1 · role unknownCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:L

Limitations and unknowns

  • KEV membership is authoritative for the catalog, not proof of exposure in any environment.
  • EPSS is a dated model probability and not an individual-environment prediction.
  • Affected or fixed status applies only to the exact cited product and version scope; unresolved scope remains unknown.
  • NVD-carried upstream facts remain derivative and are not independent corroboration.
  • Only NVD metrics validated under the generation-bound calculator are Public Priority eligible; direct CVE record metrics remain display-only.
  • NVD CVSS source eligibility is closed: NVD-authored, exact record-source, or registered same-CVE container origin; unmapped sources remain display-only.
  • Factor D is unknown in Public Core because no accepted canonical mapping-obligation ledger is present.
  • Core replay supports the active and immediately prior generation; retrospective valid-at replay is deferred.