TI-2022-09436 Aliases CVE-2022-25875 GHSA-wv8q-r932-8hc7

Cross-site scripting (XSS) in svelte

LOW 30CWE-79Published 2022-07-12 · Updated 2024-09-17

Key facts

Attack vector: Network
Privileges required: None
User interaction: Required
Attack complexity: Low
Impact type: Cross-site scripting
Confidentiality · integrity · availability: Low · Low · None
Fix status: Fixed

Attack profile from CVSS 3.1 · NVD. Fix status from CNA and GitHub. Impact type from CWE-79.

Summary

The package svelte before 3.49.0 are vulnerable to Cross-site Scripting (XSS) due to improper input sanitization and to improper escape of attributes when using objects during SSR (Server-Side Rendering). Exploiting this vulnerability is possible via objects with a custom toString() function.

Why it matters now

EPSS 0.01441 73rd percentileScored 2026-11-07

Public exploit Yes 1 exploit referenceTagged by NVD

Fix Fixed svelte: 3.49.0svelte (npm): 3.49.0

SSVC decision points

Not available: CISA has not published SSVC decision points for this record.

Affected products

Vendor	Product	Affected versions	Fixed in	Status	Source
—	svelte	before 3.49.0	3.49.0	Patch available	CNA
—	svelte (npm)	before 3.49.0	3.49.0	Patch available	GHSA-wv8q-r932-8hc7

svelte Vendor— Affected before 3.49.0 Fixed in 3.49.0 Patch available CNA
svelte (npm) Vendor— Affected before 3.49.0 Fixed in 3.49.0 Patch available GHSA-wv8q-r932-8hc7

CPE configurations NVD · 1

CPE	Versions	Role	Vendor
cpe:2.3:a:svelte:svelte::::::node.js::*	before 3.49.0	Vulnerable	sveltejs

cpe:2.3:a:svelte:svelte:*:*:*:*:*:node.js:*:* Versions before 3.49.0 Vulnerable ·sveltejs

Remediation

Fix · CNA svelte Fixed in 3.49.0
Fix · GHSA-wv8q-r932-8hc7 svelte (npm) Fixed in 3.49.0 Advisory →

Timeline

2026-10-02 Threatist record created from CVE-2022-25875
2026-10-03 Alias added: GHSA-wv8q-r932-8hc7

References

Exploit 1

https://github.com/sveltejs/svelte/commit/f8605d6acbf66976da9b4547f76e90e163899907

Advisory 1

https://nvd.nist.gov/vuln/detail/CVE-2022-25875

Other 3

TI-2024-30159 Potential mXSS vulnerability due to improper HTML escaping in svelte CVSS 3.1MEDIUM 6.1
TI-2025-13940 Svelte 5.46.0 - Hydratable Key Script-Breakout XSS (SSR) CVSS 4.0MEDIUM 5.3
TI-2021-10070 The unofficial Svelte extension before 104.8.0 for Visual Studio Code allows attackers to… CVSS 3.1HIGH 7.8
TI-2026-30847 Svelte: ReDoS in `<svelte:element>` Tag Validation CVSS 4.0MEDIUM 5.9
TI-2026-30853 Svelte: XSS via DOM Clobbering of Internal Framework State CVSS 4.0MEDIUM 5.3
TI-2026-22246 Svelte Vulnerable to XSS via HTML Comment Injection in SSR Error Boundary Hydration Markers CVSS 4.0MEDIUM 5.3

See all 12 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences