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CVE-2025-48888

5.3 · MEDIUM

Deno is a JavaScript, TypeScript, and WebAssembly runtime.

Published Jun 4, 2025CWE-863EPSS 0.41%

Overview

CVE-2025-48888 is a medium-severity vulnerability. It was published on June 4, 2025 and has a CVSS 3.1 base score of 5.3 (MEDIUM).

This vulnerability has a CVSS 3.1 base score of 5.3, rated MEDIUM. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.

Technical description

Deno is a JavaScript, TypeScript, and WebAssembly runtime. Starting in version 1.41.3 and prior to versions 2.1.13, 2.2.13, and 2.3.2, `deno run --allow-read --deny-read main.ts` results in allowed, even though 'deny' should be stronger. The result is the same with all global unary permissions given as `--allow-* --deny-*`. This only affects a nonsensical combination of flags, so there shouldn't be a real impact on the userbase. Users may upgrade to version 2.1.13, 2.2.13, or 2.3.2 to receive a patch.

Remediation

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

References

GitHubgithub.com/denoland/deno/commit/2f0fae9d9071dcaf0a689bc7097584b1b9ebc8dbGitHubgithub.com/denoland/deno/commit/9d665572d3cd39f997e29e6daac7c1102fc5c04fGitHubgithub.com/denoland/deno/commit/ef315b56c26c9ef5f25284a5100d2ed525a148cfGitHubgithub.com/denoland/deno/pull/22894GitHubgithub.com/denoland/deno/pull/29213GitHubgithub.com/denoland/deno/security/advisories/GHSA-xqxc-x6p3-w683GitHubgithub.com/denoland/deno/security/advisories/GHSA-xqxc-x6p3-w683

How CyberStrike helps

Frequently asked questions

What is CVE-2025-48888?

CVE-2025-48888 is a medium-severity vulnerability. It was published on June 4, 2025 and has a CVSS 3.1 base score of 5.3 (MEDIUM).

How severe is CVE-2025-48888?

This vulnerability has a CVSS 3.1 base score of 5.3, rated MEDIUM. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.

How do I fix or remediate CVE-2025-48888?

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

How can CyberStrike help with CVE-2025-48888?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2025-48888 is actually reachable in your own applications and APIs, then verifies each finding before reporting it. That tells you if the weakness is a real, exploitable risk in your environment or a false positive you can safely deprioritize.

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