CVE-2021-38876Network attack vector

Credential disclosure via Web UI script injection

Published Dec 30, 2021 · Updated Sep 17, 2024

Cross-site scripting in IBM's integrated operating environment 7.2, 7.3, and 7.4 allows remote attackers to disclose credentials. The Navigator heritage Web UI accepts attacker-supplied JavaScript and executes it within a trusted session, but the affected parameter or handler is undisclosed. Exploitation requires victim interaction with crafted content; the script can alter Web UI behavior and expose credentials in that session.

CVSS severity6.1
Medium
EPSS probability0.63%
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 IBM's integrated operating environment 7.2, 7.3, and 7.4 allows remote attackers to disclose credentials. The Navigator heritage Web UI accepts attacker-supplied JavaScript and executes it within a trusted session, but the affected parameter or handler is undisclosed. Exploitation requires victim interaction with crafted content; the script can alter Web UI behavior and expose credentials in that session.

The record

CVE
CVE-2021-38876
Published
Dec 30, 2021
Updated
Sep 17, 2024
Vendor
IBM
Product
IBM i
Classifications
T1189
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Dec 30, 2021CVE 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=7.2
  2. Affected versionversion=7.3
  3. Affected versionversion=7.4

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

IBM · IBM iversion=7.2; version=7.3; version=7.4

Published CVSS scores

6.1IBMCVSS:3.0/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.

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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
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

T1189Drive-by Compromise

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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