What is CVE-2025-62381?

CVE-2025-62381 is a vulnerability in Ciscoheat Sveltekit-superforms, classified under Improperly Controlled Modification of Object Prototype Attributes (Prototype Pollution). Published 2025-10-15.

Is CVE-2025-62381 known to be exploited?

1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.

Prototype Pollution in Ciscoheat Sveltekit-superforms

CVE-2025-62381

sveltekit-superforms makes SvelteKit forms a pleasure to use. sveltekit-superforms v2.27.3 and prior are susceptible to a prototype pollution vulnerability within the parseFormData function of formData.js. An attacker can inject string and…

Vulnerability class: Prototype Pollution

EPSS: 0.005 (39.3th percentile) — read the EPSS interpretation.

Affected products

Ciscoheat Sveltekit-superforms — versions < 2.27.4

Weakness classification (CWE)

CWE-1321 — Improperly Controlled Modification of Object Prototype Attributes (Prototype Pollution)

Public proof-of-concept exploits

fkie-cad/nvd-json-data-feeds

References

security-advisories@github.com (x_refsource_CONFIRM)
security-advisories@github.com (x_refsource_MISC)

Frequently asked questions

What is CVE-2025-62381?: CVE-2025-62381 is a vulnerability in Ciscoheat Sveltekit-superforms, classified under Improperly Controlled Modification of Object Prototype Attributes (Prototype Pollution). Published 2025-10-15.
Is CVE-2025-62381 known to be exploited?: 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.