CVE-2025-62585VulnerabilityPublished 16 Oct 2025

CVE-2025-62585: NAVER Whale browser · Improperly Implemented Security Check for Standard

Affects NAVER Whale browserSource CVE Database V5

Not known to be exploited · CVSS 7.5 High : upgrade to 4.33.325.17 soon.

Data as of 25 Oct 2026, 19:02 UTC

CVSS 3.1 base score

7.5High

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

EPSS: 0.3% chance of exploitation in 30 days – higher than 31% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
Patch: Available – fixed in 4.33.325.17

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

Attack Vector: Network
Attack Complexity: Low
Privileges Required: None
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: 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: 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 16 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 2026-10-25.

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

Upgrade NAVER Whale browser to 4.33.325.17.

Affected software

Product	Affected	Fixed in
NAVER NAVER Whale browser	Affected <4.33.325.17	Fixed in 4.33.325.17

AI-suggested

1. Immediate mitigation involves advising users to avoid using NAVER Whale browser for sensitive operations until a patched version is released. 2. Monitor NAVER’s official channels for security updates and apply patches promptly once available. 3. Implement strict Content Security Policies on web applications to minimize the impact of CSP bypass, including using nonce or hash-based CSP directives. 4. Educate users about the risks of interacting with multiple tabs from untrusted sources simultaneously. 5. Employ browser security controls such as disabling or restricting the use of schemes that could be exploited in dual-tab scenarios. 6. Use endpoint protection solutions capable of detecting anomalous browser behaviors indicative of exploitation attempts. 7. Consider deploying alternative browsers with robust and updated security postures for critical workflows until the vulnerability is resolved.

Description

Whale browser before 4.33.325.17 allows an attacker to bypass the Content Security Policy via a specific scheme in a dual-tab environment.

Impact

For European organizations, this vulnerability poses a significant risk to the confidentiality and integrity of web-based communications and data. Attackers exploiting the CSP bypass could inject malicious scripts, leading to credential theft, session hijacking, or unauthorized data access. This is particularly concerning for sectors handling sensitive information such as finance, healthcare, and government services. The dual-tab requirement means that user interaction is necessary, but given common browsing behaviors, this is not a high barrier. The absence of known exploits currently reduces immediate risk, but the potential for future exploitation remains high. Organizations relying on NAVER Whale browser for internal or external web access could face targeted attacks, especially if threat actors craft sophisticated social engineering campaigns to exploit this flaw. The vulnerability could also undermine trust in web applications protected by CSP, increasing the attack surface for phishing and malware distribution campaigns within European enterprises.

References

cve.naver.com/detail/cve-2025-62585.html (opens in a new tab)

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Exploitation evidence

What to do

Affected software

Description

AI analysisMachine-generated, updated 16 Oct 2025, 07:16 UTC

WeaknessesCWE-358

Technical details

References

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