CVE-2019-13389Network attack vector

Cross-site scripting via unsanitized xlink href

Published Mar 20, 2020 · Updated Aug 4, 2024

Cross-site scripting in RainLoop Webmail before 1.13.0 allows remote attackers to run script in a user's browser via crafted HTML content. The ClearHtml sanitizer fails to remove non-HTTP xlink:href attributes, allowing script-bearing links through while browser protections are absent. Exploitation requires a user to view attacker-controlled HTML; the script can read or modify data available to the affected browser session.

CVSS severity6.1
Medium
EPSS probability0.87%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Cross-site scripting in RainLoop Webmail before 1.13.0 allows remote attackers to run script in a user's browser via crafted HTML content. The ClearHtml sanitizer fails to remove non-HTTP xlink:href attributes, allowing script-bearing links through while browser protections are absent. Exploitation requires a user to view attacker-controlled HTML; the script can read or modify data available to the affected browser session.

The record

CVE
CVE-2019-13389
Published
Mar 20, 2020
Updated
Aug 4, 2024
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-79
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Mar 20, 2020CVE publishedPublication date reported by the CVE source.
  2. Aug 4, 2024Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Affected buildAffected product and version details are unavailable.

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Affected products and versions are unavailable in this record.

Published CVSS scores

4.3NIST NVDAV:N/AC:M/Au:N/C:N/I:P/A:N
6.1NIST NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-79Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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