VulnerabilityPublished 23 Oct 2025

CVE-2025-61132: braindump · A Host Header Injection

Affects braindumpSource CVE Database V5

Not known to be exploited · CVSS 7.1 High.

Data as of 26 Oct 2026, 14:05 UTC

CVSS 3.1 base score

7.1High

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

EPSS: 0.3% chance of exploitation in 30 days – higher than 30% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:H

Attack Vector: Network
Attack Complexity: Low
Privileges Required: Low
User Interaction: None
Scope: Unchanged
Confidentiality: None
Integrity: Low
Availability: High

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

Attack Vector: Network: The vulnerable component is bound to the network stack and the set of possible attackers extends beyond the other options listed, 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: Specialized access conditions or extenuating circumstances do not exist. An attacker can expect repeatable success against the vulnerable component.
Privileges Required: Low: The attacker is authorized with (i.e., requires) privileges that provide basic user capabilities that could normally affect only settings and files owned by a user. Alternatively, an attacker with Low privileges may have the ability to cause an impact only to non-sensitive resources.
User Interaction: None: The vulnerable system can be exploited without any interaction from any user.
Scope: Unchanged: An exploited vulnerability can only affect resources managed by the same security authority. In this case, the vulnerable component and the impacted component are either the same, or both are managed by the same security authority.
Confidentiality: None: There is no loss of confidentiality within the impacted component.
Integrity: Low: Modification of data is possible, but the attacker does not have control over the consequence of a modification, or the amount of modification is limited. The data modification does not have a direct, serious impact on the impacted component.
Availability: High: There is total loss of availability, resulting in the attacker being able to fully deny access to resources in the impacted component; this loss is either sustained (while the attacker continues to deliver the attack) or persistent (the condition persists even after the attack has completed). Alternatively, the attacker has the ability to deny some availability, but the loss of availability presents a direct, serious consequence to the impacted component (e.g., the attacker cannot disrupt existing connections, but can prevent new connections; the attacker can repeatedly exploit a vulnerability that, in each instance of a successful attack, leaks a only small amount of memory, but after repeated exploitation causes a service to become completely unavailable).

Definitions: FIRST CVSS v3.1 specification.

Exploitation evidence

Disclosed: evidence found.
CVE published 23 Oct 2025
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 26 Oct 2026.

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 or the CVSS exploit maturity 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
GitHublevlaz/braindump`pkg:github/levlaz/braindump`Other threats	Affected =0.4.14	Fixed in–

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

AI-suggested

To mitigate CVE-2025-61132, organizations should immediately configure the Flask application's SERVER_NAME setting to a fixed, trusted domain name, preventing url_for(_external=True) from generating URLs based on untrusted Host headers. If SERVER_NAME configuration is not feasible, implement strict validation and sanitization of the Host header to reject or ignore unexpected values. Review and update the password reset component to ensure reset links are generated securely and tokens are bound to the intended domain. Monitor application logs for unusual Host header values or suspicious password reset requests. Apply any available patches or updates from levlaz braindump maintainers as soon as they are released. Additionally, implement multi-factor authentication (MFA) to reduce the impact of potential account takeovers. Conduct security testing focused on header injection and URL generation logic. Educate users to recognize phishing attempts involving password reset links. Finally, consider deploying web application firewalls (WAFs) with rules to detect and block Host header injection attempts.

Description

A Host Header Injection vulnerability in the password reset component in levlaz braindump v0.4.14 allows remote attackers to conduct password reset poisoning and account takeover via manipulation of the Host header when Flask's url_for(_external=True) generates reset links without a fixed SERVER_NAME.

Impact

For European organizations, exploitation of CVE-2025-61132 could lead to unauthorized account takeovers, resulting in loss of user data confidentiality and integrity. Attackers could reset passwords of legitimate users, gaining access to sensitive information or internal systems if levlaz braindump is used for critical knowledge management or documentation. This could disrupt business operations, damage reputation, and lead to compliance violations under GDPR due to unauthorized access to personal data. The impact is particularly significant for organizations relying on levlaz braindump for managing sensitive or proprietary information. Additionally, phishing campaigns could leverage poisoned reset links to harvest credentials or deploy malware. The absence of known exploits suggests a window of opportunity for defenders to remediate before widespread attacks occur. However, the ease of exploitation via simple Host header manipulation and the remote nature of the attack vector increase the risk profile. Organizations with public-facing instances of levlaz braindump are especially vulnerable.

CWE-620Unverified Password Change (opens in a new tab)
Base weaknessOWASP Top 10 A07:2025: Authentication Failures (opens in a new tab)
When setting a new password for a user, the product does not require knowledge of the original password, or using another form of authentication.
Architecture and Design
When prompting for a password change, force the user to provide the original password in addition to the new password.
Architecture and Design
Do not use "forgotten password" functionality. But if you must, ensure that you are only providing information to the actual user, e.g. by using an email address or challenge question that the legitimate user already provided in the past; do not allow the current user to change this identity information until the…
OWASP Cheat Sheets
Choosing and Using Security Questions (opens in a new tab)
Forgot Password (opens in a new tab)
Credential Stuffing Prevention (opens in a new tab)
Authentication (opens in a new tab)
Transport Layer Protection (opens in a new tab)
OWASP ASVS 4.0.3
V2.1.6 (opens in a new tab)
V2.2.3 (opens in a new tab)
V2.1.5 (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 23 Oct 2025, 15:29 UTC

WeaknessesCWE-620

Technical details

References

Community reviews

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