CVE-2020-4557Network attack vector

Stored script execution via web UI injection

Published Jun 29, 2020 · Updated Sep 17, 2024

Stored cross-site scripting in IBM Business Automation Workflow and Business Process Manager allows remote authenticated users to run JavaScript. IBM has not disclosed the affected field or the missing validation or output-encoding operation; the published mechanism is stored script embedding in the web UI. A low-privileged user must store the payload and another user must render it in a trusted session, exposing session credentials to the script.

CVSS severity5.4
Medium
EPSS probability0.56%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Stored cross-site scripting in IBM Business Automation Workflow and Business Process Manager allows remote authenticated users to run JavaScript. IBM has not disclosed the affected field or the missing validation or output-encoding operation; the published mechanism is stored script embedding in the web UI. A low-privileged user must store the payload and another user must render it in a trusted session, exposing session credentials to the script.

The record

CVE
CVE-2020-4557
Published
Jun 29, 2020
Updated
Sep 17, 2024
Vendor
IBM
Product
Business Automation Workflow
Classifications
CWE-79, T1059.007
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Jun 29, 2020CVE publishedPublication date reported by the CVE source.
  2. Sep 17, 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?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=18.0
  2. Affected versionversion=19.0
  3. Affected versionversion=20.0

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

IBM · Business Automation Workflowversion=18.0; version=19.0; version=20.0
IBM · Business Process Managerversion=8.5; version=8.6

Published CVSS scores

5.4NVDCVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N
5.2IBMCVSS:3.0/PR:L/AC:L/I:L/A:N/S:C/AV:N/C:L/UI:R/RL:O/E:H/RC:C

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
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-79Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
T1059.007Command and Scripting Interpreter: JavaScript/JScript

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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