VulnerabilityPublished 2 Dec 2025

CVE-2025-13637: Google Chrome · Inappropriate Implementation

Affects Google ChromeSource CVE Database V5

Not known to be exploited · CVSS 4.3 Medium : upgrade to 143.0.7499.41 when convenient.

Data as of 26 Oct 2026, 10:12 UTC

CVSS 3.1 base score

4.3Medium

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

EPSS: 0.2% chance of exploitation in 30 days – higher than 14% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
Patch: Available – fixed in 143.0.7499.41

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

Attack Vector: Network
Attack Complexity: Low
Privileges Required: None
User Interaction: Required
Scope: Unchanged
Confidentiality: None
Integrity: Low
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: 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: 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: None: There is no impact to availability within the impacted component.

Definitions: FIRST CVSS v3.1 specification.

Exploitation evidence

Disclosed: evidence found.
CVE published 2 Dec 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

Upgrade google/chrome to 143.0.7499.41.

Affected software

Product	Affected	Fixed in
Googlegoogle/chrome`pkg:deb/google/chrome`Other threats	Affected <143.0.7499.41	Fixed in 143.0.7499.41

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

AI-suggested

Immediate update: Organizations should ensure that all instances of Google Chrome are updated to version 143.0.7499.41 or later as soon as the patch becomes available.
User education: Train users to recognize suspicious download prompts and avoid interacting with unexpected or unusual UI elements on websites, especially those prompting downloads.
Browser policy enforcement: Use enterprise browser management tools to enforce automatic updates and restrict the installation of extensions or downloads from untrusted sources.
Network controls: Implement web filtering and URL reputation services to block access to known malicious sites that could host crafted HTML pages exploiting this vulnerability.
Incident response readiness: Monitor for unusual download activities or alerts from endpoint protection solutions that could indicate exploitation attempts.
Disable or restrict downloads in sensitive environments where possible, or use sandboxing technologies to isolate downloaded files until verified safe.
Stay informed: Subscribe to security advisories from Google and relevant cybersecurity organizations to receive timely updates on patches and exploitation reports.

Description

Inappropriate implementation in Downloads in Google Chrome prior to 143.0.7499.41 allowed a remote attacker who convinced a user to engage in specific UI gestures to bypass download protections via a crafted HTML page. (Chromium security severity: Low)

Impact

For European organizations, this vulnerability poses a moderate risk primarily to the integrity of their systems. An attacker could use a crafted webpage to trick users into bypassing Chrome's download protections, potentially leading to the download and execution of malicious files. This could facilitate malware infections, data manipulation, or unauthorized software installation. While the vulnerability does not directly compromise confidentiality or availability, the resulting malware or unauthorized software could lead to broader security incidents. Organizations with employees who frequently browse the internet or handle sensitive data are at increased risk. The requirement for user interaction means that social engineering or phishing campaigns could be used to exploit this vulnerability. Given the widespread use of Google Chrome across European enterprises and public sector entities, the potential attack surface is significant. However, the absence of known exploits in the wild and the medium severity rating suggest that the immediate threat level is moderate but should not be ignored.

References

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Exploitation evidence

What to do

Affected software

Description

AI analysisMachine-generated, updated 9 Dec 2025, 20:16 UTC

WeaknessesCWE-449

Technical details

References

Community reviews

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