CVE-2025-25200
Last modified
CVE-2025-25200 is a high-severity vulnerability rated 7.5/10 on the CVSS scale. Koa is expressive middleware for Node.js using ES2017 async functions. Prior to versions 0.21.2, 1.7.1, 2.15.4, and 3.0.0-alpha.3, Koa uses an evil regex to parse the `X-Forwarded-Proto` and `X-Forwarded-Host` HTTP headers. EPSS estimates a 0.77% chance of exploitation in the next 30 days.
Description
Koa is expressive middleware for Node.js using ES2017 async functions. Prior to versions 0.21.2, 1.7.1, 2.15.4, and 3.0.0-alpha.3, Koa uses an evil regex to parse the `X-Forwarded-Proto` and `X-Forwarded-Host` HTTP headers. This can be exploited to carry out a Denial-of-Service attack. Versions 0.21.2, 1.7.1, 2.15.4, and 3.0.0-alpha.3 fix the issue.
Metrics
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:H/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
Weakness Enumeration
Affected Software
| Vendor | Product | Versions | Update |
|---|---|---|---|
| Koajs | Koa | < 0.21.2 | — |
| Koajs | Koa | >= 1.0.0, < 1.7.1 | — |
| Koajs | Koa | >= 2.0.0, < 2.15.4 | — |
| Koajs | Koa | 3.0.0 | Alpha0 |
References
- https://github.com/koajs/koa/releases/tag/2.15.4Release Notes
Timeline
- Published
- Last Modified
- Status
- Analyzed
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How Strix Helps
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