VulnerabilityPublished 23 Jul 2025

CVE-2025-50477: lbry-desktop · Open Redirect

Affects lbry-desktopSource CVE Database V5

Not known to be exploited · CVSS 5.4 Medium.

Data as of 26 Oct 2026, 13:47 UTC

CVSS 3.1 base score

5.4Medium

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

EPSS: 0.3% chance of exploitation in 30 days – higher than 29% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.

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

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

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: None: The attacker is unauthorized prior to attack, and therefore does not require any access to settings or files to carry out an attack.
User Interaction: Required: Successful exploitation of this vulnerability requires a user to take some action before the vulnerability can be exploited.
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: Low: There is some loss of confidentiality. Access to some restricted information is obtained, but the attacker does not have control over what information is obtained, or the amount or kind of loss is limited. The information disclosure does not cause a direct, serious loss to the impacted component.
Integrity: None: There is no loss of integrity within the impacted component.
Availability: Low: Performance is reduced or there are interruptions in resource availability. Even if repeated exploitation of the vulnerability is possible, the attacker does not have the ability to completely deny service to legitimate users. The resources in the impacted component are either partially available all of the time, or fully available only some of the time, but overall there is no direct, serious consequence to the impacted component.

Definitions: FIRST CVSS v3.1 specification.

Exploitation evidence

Disclosed: evidence found.
CVE published 23 Jul 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
npmlbry-desktop`pkg:npm/lbry-desktop`Other threats	Affected =0.53.9	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 the risks associated with CVE-2025-50477, European organizations should implement several targeted measures beyond generic advice: 1) Update and Patch: Monitor the lbry-desktop project for official patches or updates addressing this vulnerability and apply them promptly once available. 2) Input Validation: If organizations develop or customize lbry-desktop clients, ensure strict validation and sanitization of URL inputs to prevent open redirection. 3) User Awareness Training: Educate users about the risks of clicking unsolicited or suspicious links, emphasizing verification of URLs before interaction. 4) Email and Web Filtering: Deploy advanced email security gateways and web proxies capable of detecting and blocking known malicious URLs and phishing attempts related to lbry-desktop redirection. 5) Endpoint Protection: Strengthen endpoint defenses with updated anti-malware solutions that can detect payloads delivered via redirected sites. 6) Monitoring and Incident Response: Implement monitoring for unusual outbound web traffic from lbry-desktop clients and establish incident response procedures to quickly address potential exploitation attempts. 7) Network Segmentation: Limit the exposure of critical systems by segmenting networks to contain potential malware spread originating from compromised endpoints. These measures collectively reduce the attack surface and improve resilience against exploitation of the URL redirection vulnerability.

Description

A URL redirection in lbry-desktop v0.53.9 allows attackers to redirect victim users to attacker-controlled pages.

Impact

For European organizations, the impact of CVE-2025-50477 can be significant, especially for those relying on lbry-desktop for content distribution, media sharing, or decentralized communication. Users redirected to malicious sites may inadvertently disclose sensitive information, such as login credentials or personal data, leading to potential data breaches or identity theft. Additionally, redirected users could be exposed to malware infections that compromise endpoint security, potentially allowing attackers to gain footholds within corporate networks. This risk is heightened in sectors with high regulatory requirements for data protection, such as finance, healthcare, and government agencies, where user trust and data confidentiality are paramount. Moreover, organizations using lbry-desktop as part of their digital content strategy may suffer reputational damage if their users are targeted through this vulnerability. While the vulnerability does not directly affect system availability, the indirect consequences of successful exploitation could lead to operational disruptions and increased incident response costs. The absence of known exploits in the wild provides a window for proactive mitigation, but the ease of exploitation through social engineering underscores the need for immediate attention.

CWE-601URL Redirection to Untrusted Site ('Open Redirect') (opens in a new tab)
Base weaknessLikelihood of exploit: LowOWASP Top 10 A01:2025: Broken Access Control (opens in a new tab)
The web application accepts a user-controlled input that specifies a link to an external site, and uses that link in a redirect.
Implementation · Input Validation
Assume all input is malicious. Use an "accept known good" input validation strategy, i.e., use a list of acceptable inputs that strictly conform to specifications. Reject any input that does not strictly conform to specifications, or transform it into something that does.
Architecture and Design
Use an intermediate disclaimer page that provides the user with a clear warning that they are leaving the current site. Implement a long timeout before the redirect occurs, or force the user to click on the link. Be careful to avoid XSS problems (CWE-79) when generating the disclaimer page.
Architecture and Design · Enforcement by Conversion
When the set of acceptable objects, such as filenames or URLs, is limited or known, create a mapping from a set of fixed input values (such as numeric IDs) to the actual filenames or URLs, and reject all other inputs.
OWASP Cheat Sheets
Mass Assignment (opens in a new tab)
Authorization (opens in a new tab)
OWASP ASVS 4.0.3
V5.1.5 (opens in a new tab)
Attack patterns
Cross-Site Flashing (opens in a new tab)
From MITRE CWE, MITRE CAPEC and OWASP (Top 10, OpenCRE).

References

Community reviews

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Exploitation evidence

What to do

Affected software

Description

AI analysisMachine-generated, updated 23 Jul 2025, 19:02 UTC

WeaknessesCWE-601

Technical details

References

Community reviews

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