CVE-2019-19381Public exploitNetwork attack vector

Browser script execution via unencoded login errors

Published Mar 11, 2020 · Updated Aug 5, 2024

Reflected XSS in Abacus OAuth Login 2018 before R6 and 2019 before R4 allows remote attackers to execute script through failed login errors. The /oauth/oauth2/v1/saml/ endpoint inserts a user-specified failed-login error message into its HTML response without output encoding. A victim must open the crafted request; script then runs in the vulnerable origin, and 2018 is affected only with AbaWebserver (Jetty), not AbaSioux.

CVSS severity6.1
Medium
EPSS probability0.72%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Reflected XSS in Abacus OAuth Login 2018 before R6 and 2019 before R4 allows remote attackers to execute script through failed login errors. The /oauth/oauth2/v1/saml/ endpoint inserts a user-specified failed-login error message into its HTML response without output encoding. A victim must open the crafted request; script then runs in the vulnerable origin, and 2018 is affected only with AbaWebserver (Jetty), not AbaSioux.

The record

CVE
CVE-2019-19381
Published
Mar 11, 2020
Updated
Aug 5, 2024
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-79, T1203
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Mar 11, 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 privilegesunauthenticated

What is affected?

Affected products and versions are unavailable in this record.

Published CVSS scores

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

Weakness, pattern, technique

CWE-79Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
T1203Exploitation for Client Execution

Public exploit references

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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