VulnerabilityPublished 6 Aug 2025

CVE-2025-46389: Emby MediaBrowser · Unverified Password Change

Affects Emby MediaBrowserSource CVE Database V5

Not known to be exploited · CVSS 6.5 Medium.

Data as of 26 Oct 2026, 15:59 UTC

CVSS 3.1 base score

6.5Medium

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

EPSS: 0.2% chance of exploitation in 30 days – higher than 13% 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:H/A:N

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

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: 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 impacted component. Alternatively, only some files can be modified, but malicious modification would present a direct, serious consequence to the impacted component.
Availability: None: There is no impact to availability within the impacted component.

Definitions: FIRST CVSS v3.1 specification.

Exploitation evidence

Disclosed: evidence found.
CVE published 6 Aug 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
Emby MediaBrowser	Affected =4.9.0.35	Fixed in–

AI-suggested

To mitigate this vulnerability, European organizations should first verify if they are running the affected version 4.9.0.35 of Emby MediaBrowser. Immediate steps include restricting network access to the Emby server to trusted internal networks or VPNs to reduce exposure. Implement strict access controls and monitor for unusual password change activities or account modifications. Employ multi-factor authentication (MFA) for user accounts if supported by Emby to add an additional layer of verification beyond passwords. Organizations should also consider isolating Emby services from critical infrastructure to limit potential lateral movement. Additionally, reviewing and hardening Emby's configuration settings to enforce stronger authentication policies and logging all administrative actions will aid in early detection and response. Regular audits of user accounts and password policies will further reduce risk.

Description

CWE-620: Unverified Password Change

Impact

For European organizations using Emby MediaBrowser 4.9.0.35, this vulnerability poses a significant risk to the integrity of user accounts and access controls. An attacker exploiting this flaw could change passwords of other users, potentially leading to unauthorized access to media content and associated data. While confidentiality and availability are not directly impacted, the integrity breach could facilitate further attacks, such as privilege escalation or lateral movement within the network if Emby is integrated with broader authentication systems. Organizations relying on Emby for internal or public media streaming services may face service disruption or reputational damage if unauthorized users gain control over accounts. Additionally, compromised accounts could be used to distribute malicious content or conduct further attacks, increasing the overall security risk. Given the remote exploitability and lack of user interaction required, the threat is more pronounced in environments where Emby servers are exposed to untrusted networks or where user privilege separation is weak.

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

gov.il/en/departments/dynamiccollectors/cve_advisories_listing?skip=0 (opens in a new tab)

Community reviews

Loading reviews…

Exploitation evidence

What to do

Affected software

Description

AI analysisMachine-generated, updated 6 Aug 2025, 11:17 UTC

WeaknessesCWE-620

Technical details

References

Community reviews

Related threats