Admin account takeover via unencoded REST errors
Published Feb 18, 2026 · Updated Feb 18, 2026
Cross-site scripting in Payara Server before 4.1.2.191.54, 5.83.0, 6.34.0, or 7.2026.1 allows attackers to take over admin accounts. The REST Management Interface places URL-derived data into an error message without output encoding, causing an administrator's browser to execute attacker-controlled JavaScript. Exploitation requires high privileges and active administrator interaction with the crafted URL; successful execution can change the administrator password.
Summary
What happened
Cross-site scripting in Payara Server before 4.1.2.191.54, 5.83.0, 6.34.0, or 7.2026.1 allows attackers to take over admin accounts. The REST Management Interface places URL-derived data into an error message without output encoding, causing an administrator's browser to execute attacker-controlled JavaScript. Exploitation requires high privileges and active administrator interaction with the crafted URL; successful execution can change the administrator password.
The record
- CVE
- CVE-2025-14340
- Published
- Feb 18, 2026
- Updated
- Feb 18, 2026
- Vendor
- Payara
- Product
- Payara Server
- Classifications
- CWE-79, CAPEC-173, T1203
- Attack vector
- network
- Privileges
- admin
Timeline
How it unfolded
- Feb 18, 2026CVE publishedPublication date reported by the CVE source.
- Feb 18, 2026Record 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.
- Affected versionversion=4.1.153.1 <=4.1.2.191.53
- Affected versionversion=5.181 <=5.201.2
- Affected versionversion=5.20.0 <=5.82.0
- Affected versionversion=5.2020.2 <=5.2022.5
- Affected versionversion=6.0.0 <=6.33.0
- Affected versionversion=6.2022.1 <=6.2025.11
- Affected versionversion=7.2024.1.Alpha1 <=7.2025.2
What conditions does exploitation require?
What is affected?
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.
Weakness, pattern, technique
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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