Severity by source
AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N
Primary rating from Vendor (ibm).
CVSS VectorNVD
Lifecycle Timeline
2DescriptionNVD
IBM i 7.6, 7.5, 7.4, and 7.3 is vulnerable to stored cross-site scripting. This vulnerability allows an authenticated user to embed arbitrary JavaScript code in the Web UI thus altering the intended functionality potentially leading to credentials disclosure within a trusted session.
AnalysisAI
Stored cross-site scripting in IBM i versions 7.3 through 7.6 allows an authenticated low-privileged user to inject persistent JavaScript into the Web UI, executing it in other users' browser sessions within the same trusted environment. The Scope:Changed CVSS metric confirms the payload crosses session boundaries, enabling credential theft or session hijacking against other authenticated users. IBM has released a patch via advisory node/7283292; no public exploit code or active exploitation has been identified at time of analysis.
Technical ContextAI
IBM i (formerly iSeries/AS400) is IBM's proprietary operating system for Power Systems hardware, widely deployed in enterprise, financial, and government environments for mission-critical workloads. The affected component is the IBM i Web UI, which fails to properly sanitize or encode user-supplied data before persisting and rendering it - the textbook definition of CWE-79 (Improper Neutralization of Input During Web Page Generation). The CPE string cpe:2.3:a:ibm:i:*:*:*:*:*:*:*:* covers all versions without a fixed upper bound specified, confirming versions 7.3, 7.4, 7.5, and 7.6 are explicitly named as vulnerable. Stored XSS is categorically more severe than reflected XSS because the payload persists server-side and fires for every subsequent visitor to the affected page - no social engineering per victim is required once the payload is planted.
RemediationAI
Apply the vendor-supplied fix documented at https://www.ibm.com/support/pages/node/7283292; IBM has confirmed a patch is available but the exact PTF identifiers or fixed sub-version numbers should be retrieved directly from that advisory, as they are not specified in the available intelligence data. As a compensating control prior to patching, restrict Web UI access to known-trusted IP ranges at the network perimeter to reduce the pool of users who could plant a payload. Additionally, enforce least-privilege policies so that low-privileged accounts cannot access UI sections where stored input is rendered to administrative users - this limits the blast radius of a planted payload. Content Security Policy (CSP) headers, if configurable in the IBM i Web UI, can reduce XSS exploitability but IBM's support for this should be verified before relying on it.
Same weakness CWE-79 – Cross-site Scripting (XSS)
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External POC / Exploit Code
Leaving vuln.today
EUVD-2026-57354
GHSA-6mc7-x563-wpr5