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ExploitedIn CISA KEVFix available

CVE-2020-13965

Exploitation confirmed. First attested on 2024-06-26 by CISA-ADP, CISA KEV, GCVE · kevintel.

  • Published2020-06-09
  • WeaknessCWE-79 · CWE-80

Am I affected?

With a domain, we read the version its public headers and pages expose. A distribution build can carry the fix under an older number.

Description

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.

Timeline

dates in UTC
  1. 2020-06-0903:15CVE publishedNVD
  2. 2024-06-26Added to the CISA KEV catalogCISA KEV
  3. 2024-06-26Listed as exploited by GCVEGCVE
  4. 2024-06-26Exploitation first reportedCISA KEV
  5. 2024-06-2615:33SSVC exploitation set to activeCISA-ADP

Observed activity

isMalicious corpus · updated 2026-11-04 09:37 UTC
Indicators tagged with this CVE, per day0 indicators over 7 days
Block these indicators
  • Firewall list (EDL, text): https://api.ismalicious.com/edl/cve/CVE-2020-13965?format=txt
  • CSV export: https://api.ismalicious.com/edl/cve/CVE-2020-13965?format=csv
  • TAXII collection of exploited CVEs
  • The EDL and CSV take an API key on the Pro plan.

Versions per branch

NVD · CISA-ADP · OSV
Debian debian linux
BranchAffectedFixed in
9.0= 9.0no fix published
10.0= 10.0no fix published
Fedoraproject fedora
BranchAffectedFixed in
31.x= 31no fix published
32.x= 32no fix published
Roundcube webmail
BranchAffectedFixed in
1.4≥ 1.4.0, < 1.4.51.4.5
1.3< 1.3.121.3.12

as publishedRanges as NVD and OSV publish them; a distribution’s build can be fixed under an older number.

Distribution builds and vendor advisories

Packages from OSV.dev and products from the vendors' CSAF advisories.

version not verifiedVersions not verified: read as OSV.dev and the vendors publish them, not checked against each vendor's release list.

Packages

  • roundcubeUbuntu:Pro:22.04:LTSall versions · fixed in 1.5.0+dfsg.1-2ubuntu0.1~esm1
  • roundcubeUbuntu:Pro:20.04:LTSall versions · fixed in 1.4.3+dfsg.1-1ubuntu0.1~esm1
  • roundcubeUbuntu:Pro:20.04:LTSall versions · fixed in 1.4.3+dfsg.1-1ubuntu0.1~esm2
  • roundcubeUbuntu:Pro:18.04:LTSall versions · fixed in 1.3.6+dfsg.1-1ubuntu0.1~esm2
  • roundcubeUbuntu:Pro:16.04:LTSall versions · fixed in 1.2~beta+dfsg.1-0ubuntu1+esm2
  • roundcubeDebian:14all versions · fixed in 1.4.5+dfsg.1-1
  • roundcubeDebian:13all versions · fixed in 1.4.5+dfsg.1-1
  • roundcubeDebian:12all versions · fixed in 1.4.5+dfsg.1-1

3 more package ranges on OSV.dev

Vendor advisories

  • CVE-2020-13965 Red Hat Product Security

    roundcubemail: XSS via a malicious XML attachment

Full record on NVD

Fix

  1. CISA’s required action: Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable.due 2024-07-17

Advisories and patches

Detection

read 2026-11-03 22:42 UTC
Nuclei template
none so far
ProjectDiscovery
Exploit-DB
no entry
Exploit-DB
Proof-of-concept repositories
1 repository, unverifiedmbadanoiu/CVE-2020-13965
PoC-in-GitHub
Metasploit modules
none listed
Metasploit Framework

CISA Known Exploited Vulnerability

Date Added
2024-06-26
Patch Due Date
2024-07-17
Ransomware Use
Unknown
Required Action
Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable.

Sources

Identifiers

Technical details

CVSS v3 Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
Published
2020-06-09
Last Modified
2026-06-17
NVD status
Analyzed
GitHub Advisory
GHSA-44qp-5pm8-6j8p

Frequently asked questions

What is 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.

Is CVE-2020-13965 actively exploited?

Yes. CVE-2020-13965 is on the CISA Known Exploited Vulnerabilities (KEV) catalog, meaning it has been confirmed as actively exploited in the wild. CISA requires federal agencies to patch by 2024-07-17.

What is the CVSS score for CVE-2020-13965?

CVE-2020-13965 has a CVSS v3 base score of 6.1 (MEDIUM severity), with vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N.

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Sources for this record