Credential disclosure via unrestricted reverse-proxy header forwarding
Published Jun 17, 2025 · Updated Jun 18, 2025
Information disclosure in Portainer LTS before 2.27.7 and STS before 2.31.0 allows remote attackers to obtain credentials or session tokens. The registry reverse-proxy director forwards incoming request headers to the configured registry without filtering sensitive authorization, cookie, CSRF-token, or API-key fields. Exploitation requires an administrator to register an attacker-controlled registry or the takeover of an existing registry; disclosed credentials and tokens expose their associated accounts.
Summary
What happened
Information disclosure in Portainer LTS before 2.27.7 and STS before 2.31.0 allows remote attackers to obtain credentials or session tokens. The registry reverse-proxy director forwards incoming request headers to the configured registry without filtering sensitive authorization, cookie, CSRF-token, or API-key fields. Exploitation requires an administrator to register an attacker-controlled registry or the takeover of an existing registry; disclosed credentials and tokens expose their associated accounts.
The record
- CVE
- CVE-2025-49593
- Published
- Jun 17, 2025
- Updated
- Jun 18, 2025
- Vendor
- Portainer
- Product
- Portainer
- Classifications
- CWE-200
- Attack vector
- network
- Privileges
- admin
Timeline
How it unfolded
- Jun 17, 2025CVE publishedPublication date reported by the CVE source.
- Jun 18, 2025Record 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=< 2.27.7
- Affected versionversion=< 2.31.0
What conditions does exploitation require?
What is affected?
Published CVSS scores
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.
Weakness, pattern, technique
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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