Cross-site scripting in Koa



Risk Low
Patch available YES
Number of vulnerabilities 1
CVE-ID CVE-2025-32379
CWE-ID CWE-79
Exploitation vector Network
Public exploit N/A
Vulnerable software
 koa
Web applications / Other software

Vendor Koa.js

Security Bulletin

This security bulletin contains one low risk vulnerability.

1) Cross-site scripting

EUVDB-ID: #VU111996

Risk: Low

CVSSv4.0: 0.5 [CVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:A/VC:L/VI:L/VA:L/SC:L/SI:L/SA:N/E:U/U:Clear]

CVE-ID: CVE-2025-32379

CWE-ID: CWE-79 - Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')

Exploit availability: No

Description

The disclosed vulnerability allows a remote attacker to perform cross-site scripting (XSS) attacks.

The vulnerability exists due to insufficient sanitization of user-supplied data. A remote attacker can trick the victim to follow a specially crafted link and execute arbitrary HTML and script code in user's browser in context of vulnerable website.

Successful exploitation of this vulnerability may allow a remote attacker to steal potentially sensitive information, change appearance of the web page, perform phishing and drive-by-download attacks.

Mitigation

Install update from vendor's website.

Vulnerable software versions

koa: 2.0.0 - 3.0.0.4

CPE2.3 External links

https://github.com/koajs/koa/commit/ff25eb4a7f2392df46481fe86355161067687312
https://github.com/koajs/koa/security/advisories/GHSA-x2rg-q646-7m2v


Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.



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