CVE-2025-64425VulnerabilityPublished 5 Jan 2026

CVE-2025-64425: coollabsio coolify · Improper Neutralization of HTTP Headers for Scripting Syntax

Affects coollabsio coolifySource CVE Database V5

Not known to be exploited · CVSS 8.5 High.

Data as of 26 Oct 2026, 06:26 UTC

CVSS 4.0 base score

8.5High

How severe the flaw is on the 0–10 CVSS scale.

EPSS: 0.4% chance of exploitation in 30 days – higher than 36% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.

CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N

Attack Vector: Network
Attack Complexity: Low
Attack Requirements: None
Privileges Required: None
User Interaction: Active
Vulnerable system confidentiality: High
Vulnerable system integrity: High
Vulnerable system availability: None
Subsequent system confidentiality: None
Subsequent system integrity: None
Subsequent system availability: None

Bold values are the worst case: easiest to exploit or largest impact.

Attack Vector: Network: The vulnerable system is bound to the network stack and the set of possible attackers extends beyond the other options listed below, up to and including the entire Internet. Such a vulnerability is often termed “remotely exploitable” and can be thought of as an attack being exploitable at the protocol level one or more network hops away (e.g., across one or more routers).
Attack Complexity: Low: The attacker must take no measurable action to exploit the vulnerability. The attack requires no target-specific circumvention to exploit the vulnerability. An attacker can expect repeatable success against the vulnerable system.
Attack Requirements: None: The successful attack does not depend on the deployment and execution conditions of the vulnerable system. The attacker can expect to be able to reach the vulnerability and execute the exploit under all or most instances of the vulnerability.
Privileges Required: None: The attacker is unauthorized prior to attack, and therefore does not require any access to settings or files of the vulnerable system to carry out an attack.
User Interaction: Active: Successful exploitation of this vulnerability requires a targeted user to perform specific, conscious interactions with the vulnerable system and the attacker’s payload, or the user’s interactions would actively subvert protection mechanisms which would lead to exploitation of the vulnerability.
Vulnerable system confidentiality: High: There is a total loss of confidentiality, resulting in all information within the Vulnerable System being divulged to the attacker. Alternatively, access to only some restricted information is obtained, but the disclosed information presents a direct, serious impact. For example, an attacker steals the administrator's password, or private encryption keys of a web server.
Vulnerable system integrity: High: There is a total loss of integrity, or a complete loss of protection. For example, the attacker is able to modify any/all files protected by the vulnerable system. Alternatively, only some files can be modified, but malicious modification would present a direct, serious consequence to the vulnerable system.
Vulnerable system availability: None: There is no impact to availability within the Vulnerable System.
Subsequent system confidentiality: None: There is no loss of confidentiality within the Subsequent System or all confidentiality impact is constrained to the Vulnerable System.
Subsequent system integrity: None: There is no loss of integrity within the Subsequent System or all integrity impact is constrained to the Vulnerable System.
Subsequent system availability: None: There is no impact to availability within the Subsequent System or all availability impact is constrained to the Vulnerable System.

Definitions: FIRST CVSS v4.0 specification.

Exploitation evidence

Disclosed: evidence found.
CVE published 5 Jan 2026
Detectable: no evidence on record.
No public nuclei template indexed
Weaponised: no evidence on record.
No public exploit code indexed in Metasploit or Exploit-DB
Exploited in the wildExploited: no evidence on record.
Not in CISA KEV and no source reports exploitation
Observed by OffSeq MirageSeen by Mirage: no evidence on record.
No attack traffic recorded by OffSeq Mirage sensors

A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 2026-10-26.

Disclosed: The CVE record is public on cve.org. Its publication is t = 0.
Detectable: A public nuclei template can find exposed instances, for defenders and attackers alike.
Weaponised: Public exploit code exists in Metasploit or Exploit-DB, or CISA SSVC reports a public proof of concept.
Exploited in the wild: CISA KEV lists it, CISA SSVC rates exploitation active, or a source reports attacks.
Observed by OffSeq Mirage: OffSeq Mirage honeypot sensors recorded attack traffic for this CVE, or found exposed hosts without attack traffic.

Moments are spaced evenly, not to scale; a dashed line marks a gap of six months or more. Deltas count from t = 0. Sources that give only a date (CISA KEV, Exploit-DB, or a time of exactly 00:00Z) read “same day” rather than hours. Metasploit modules carry the flaw’s disclosure date, not their release date, and nuclei templates carry no date, so both appear above but not on the timeline.

What to do

Affected software

Product	Affected	Fixed in
coollabsiocoolify	Affected <=4.0.0-beta.434	Fixed in–
GitHubcoollabsio/coolify`pkg:github/coollabsio/coolify`Other threats	Affected =4.0.0-beta.434	Fixed in–

Check your own hosts for these packages with threat-finder (opens in a new tab), our free open-source scanner.

AI-suggested

1. Immediately audit and monitor password reset workflows and email templates within Coolify to detect any anomalies or unauthorized Host header manipulations. 2. Implement strict validation and sanitization of the Host header in all HTTP requests, ensuring that only legitimate, whitelisted domains are used when generating password reset links. 3. Educate users about phishing risks, emphasizing caution when clicking password reset links, especially if received unexpectedly. 4. Employ multi-factor authentication (MFA) on all user accounts to reduce the impact of credential compromise. 5. Monitor logs for unusual password reset requests or multiple reset attempts targeting the same account. 6. Restrict access to Coolify management interfaces to trusted networks or VPNs to reduce exposure. 7. If possible, temporarily disable password reset functionality or implement manual verification until a patch is released. 8. Stay updated with vendor communications and apply patches immediately once available. 9. Consider deploying web application firewalls (WAFs) with rules to detect and block suspicious Host header manipulations. 10. Conduct regular security assessments and penetration tests focusing on authentication and password reset mechanisms.

Description

CVE-2025-64425 is a high-severity vulnerability in Coolify versions up to 4.0.0-beta.434, an open-source server and application management tool. The flaw involves improper neutralization of HTTP headers, specifically allowing an attacker to manipulate the Host header during a password reset request. This manipulation causes the victim to receive a password reset email containing a link pointing to a malicious host controlled by the attacker. If the victim clicks the link, their reset token is leaked to the attacker, enabling account takeover. No authentication or privileges are required to exploit this vulnerability, but user interaction (clicking the malicious link) is necessary. There is no known patch at the time of publication, and no known exploits in the wild have been reported. The CVSS v4.

Impact

For European organizations, the impact of CVE-2025-64425 can be severe. Coolify is used to manage servers, applications, and databases, so account compromise could lead to unauthorized access to critical infrastructure components. Attackers gaining control over user accounts can manipulate deployments, access sensitive data, or disrupt services. This can result in data breaches, service outages, and loss of trust. Given the vulnerability requires no authentication and can be triggered remotely, the attack surface is broad. The necessity of user interaction (clicking the malicious link) means social engineering is a key component, which can be facilitated via phishing campaigns. Organizations in sectors with high regulatory requirements such as finance, healthcare, and government are particularly at risk due to the potential exposure of sensitive personal or operational data. Additionally, compromised accounts could be leveraged for lateral movement within networks, increasing the scope of impact. The lack of a patch at the time of disclosure means organizations must rely on mitigations to reduce risk until an official fix is available.

CWE-644Improper Neutralization of HTTP Headers for Scripting Syntax (opens in a new tab)
Variant weaknessLikelihood of exploit: HighOWASP Top 10 A05:2025: Injection (opens in a new tab)
The product does not neutralize or incorrectly neutralizes web scripting syntax in HTTP headers that can be used by web browser components that can process raw headers, such as Flash.
Architecture and Design
Perform output validation in order to filter/escape/encode unsafe data that is being passed from the server in an HTTP response header.
Architecture and Design
Disable script execution functionality in the clients' browser.
OWASP Cheat Sheets
Content Security Policy (opens in a new tab)
Injection Prevention (opens in a new tab)
SQL Injection Prevention (opens in a new tab)
Injection Prevention in Java (opens in a new tab)
Query Parameterization (opens in a new tab)
OWASP ASVS 4.0.3
V14.4.6 (opens in a new tab)
V14.4.4 (opens in a new tab)
V14.4.2 (opens in a new tab)
From MITRE CWE, MITRE CAPEC and OWASP (Top 10, OpenCRE).

References

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Exploitation evidence

What to do

Affected software

Description

AI analysisMachine-generated, updated 12 Jan 2026, 21:38 UTC

WeaknessesCWE-644

Technical details

References

Community reviews

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