CVE-2021-27335

PoC —

CVSS 3.1

9.8 critical

EPSS

3%p87

Published

Feb 18, 2021 (Feb 18, 2021)

Modified

Jun 17, 2026

Description

KollectApps before 4.8.16c is affected by insecure Java deserialization, leading to Remote Code Execution via a ysoserial.payloads.CommonsCollections parameter.

Vendors: kollectapp
Products: kollect
Weakness: CWE-502
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

NVD CVE.org GitHub PoCs EPSS (3.0%)

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