Cross-Site Scripting in i18next

published 2018-06-04 8 y ago modified 2026-06-17 4 mo ago also GHSA-f89g-whpf-6q9m , EUVD-2018-0747

cvss: 6.1; version 3.0, NVD
cisa kev: Not listed; not in CISA's catalog
epss: 0.8%; EPSS 0.8% chance of exploitation in 30 days, percentile 58%
public exploits: 0; none known

i18next is a language translation framework. Because of how the interpolation is implemented, making replacements from the dictionary one at a time, untrusted user input can use the name of one of the dictionary keys to inject script into the browser. This affects i18next <=1.10.2.

Patch / fix

fixed in 1 links 1

npm i18next 1.10.3

github.com/i18next/i18next#443 pull request

Exploit prediction

0.85% chance of exploitation in the next 30 days, higher than 58% of all scored CVEs (FIRST EPSS, 2026-11-08).

Exploits and checks

github.com https://github.com/i18next/i18next/pull/443 referenced PoC, tagged "exploit" by a source, unverified
nodesecurity.io https://nodesecurity.io/advisories/325 referenced PoC, tagged "exploit" by a source, unverified

CVSS scores

assigned by	version	score	vector
NVD	3.0	6.1	CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
NVD	2.0	4.3	AV:N/AC:M/Au:N/C:N/I:P/A:N
GitHub	3.0	6.1	CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N

Affected packages

ecosystem	package	affected	fixed in
npm	i18next	<1.10.3	1.10.3

Affected products

HackerOne i18next node module

Classification

Weakness

CWE-79 Improper Neutralization of Input During Web Page Generation

References

github.com /i18next/i18next/pull/443
web, exploit, issue-tracking, patch, third-party-advisory
nodesecurity.io /advisories/325
exploit, third-party-advisory
nvd.nist.gov /vuln/detail/CVE-2017-16008
advisory
github.com /advisories/GHSA-f89g-whpf-6q9m
advisory
npmjs.com /advisories/325
web

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.

Summary