CVE-2019-19856Network attack vector

Stored XSS via unescaped user type rendering

Published Jan 15, 2020 · Updated Aug 5, 2024

Stored XSS in Serpico 1.3.0 allows remote authenticated users to execute script in another administrator's browser via a crafted user type. The list_user.haml view interpolates user.type into the administrator user table without Haml's escaped filter, causing persisted markup to become active page content. Exploitation requires administrative privileges to store the type value and another administrator to view the user list, enabling script execution in that viewer's session.

CVSS severity4.8
Medium
EPSS probability0.71%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Stored XSS in Serpico 1.3.0 allows remote authenticated users to execute script in another administrator's browser via a crafted user type. The list_user.haml view interpolates user.type into the administrator user table without Haml's escaped filter, causing persisted markup to become active page content. Exploitation requires administrative privileges to store the type value and another administrator to view the user list, enabling script execution in that viewer's session.

The record

CVE
CVE-2019-19856
Published
Jan 15, 2020
Updated
Aug 5, 2024
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-79, T1189
Attack vector
network
Privileges
admin

Timeline

How it unfolded

  1. Jan 15, 2020CVE publishedPublication date reported by the CVE source.
  2. Aug 5, 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 privilegesadmin

What is affected?

Affected products and versions are unavailable in this record.

Published CVSS scores

3.5NIST NVDAV:N/AC:M/Au:S/C:N/I:P/A:N
4.8NIST NVDCVSS:3.1/AV:N/AC:L/PR:H/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 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesadmin
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-79Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
T1189Drive-by Compromise

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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