EUVD-2026-41450
GHSA-cpgq-h7v8-r7qm
Severity by source
CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:P/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
Requires high privileges to inject (PR:H); stored XSS changes scope by executing in other admins' browsers (S:C), with low confidentiality and integrity impact and no availability impact.
Primary rating from Vendor (WatchGuard).
CVSS VectorVendor: WatchGuard
CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:P/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
Lifecycle Timeline
1DescriptionCVE.org
Improper Neutralization of Input During Web Page Generation (XSS or 'Cross-site Scripting') vulnerability in WatchGuard Fireware OS (Autotask Technology Integration module) allows Stored XSS. This vulnerability is an additional unmitigated attack path for CVE-2025-13938.
This issue affects Fireware OS 12.4 up to and including 12.12, 12.5 up to and including 12.5.18, and 2025.1 up to and including 2026.2.
AnalysisAI
Stored cross-site scripting in WatchGuard Fireware OS's Autotask Technology Integration module allows a high-privileged attacker to inject persistent malicious scripts that execute in the browsers of other users who view the affected management interface pages. Affecting Fireware OS versions 12.4 through 12.12, 12.5 through 12.5.18, and 2025.1 through 2026.2, this flaw is explicitly described as an additional unmitigated attack path alongside the related CVE-2025-13938, suggesting prior remediation efforts were incomplete. …
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | Exploitation requires an authenticated session with high-privilege (administrative) access to the WatchGuard Fireware OS management interface, as reflected in the CVSS 4.0 PR:H metric - unauthenticated remote attackers cannot exploit this vulnerability. … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | The CVSS 4.0 score of 4.8 (Medium) accurately captures the constrained risk profile: the PR:H metric is the dominant limiting factor, requiring an attacker to already hold administrative credentials before injecting a payload. … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in. |
| Exploit Scenario | An attacker who has obtained or compromised administrative credentials to the WatchGuard Fireware OS management interface navigates to the Autotask Technology Integration module and injects a malicious JavaScript payload into a vulnerable input field, which is then persisted server-side. When another administrator subsequently opens the affected management page during their session, the stored script executes silently in their browser, enabling session cookie theft, credential harvesting via fake prompts, or unauthorized administrative actions performed under the victim's session. … |
| Remediation | WatchGuard has published advisory WGSA-2026-00017 at https://www.watchguard.com/wgrd-psirt/advisory/wgsa-2026-00017, and a patch is available per vendor advisory; however, exact remediated version numbers are not enumerated in available intelligence and must be confirmed directly from that advisory before upgrade planning. … Detailed patch versions, workarounds, and compensating controls in full report. |
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External POC / Exploit Code
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