What is CVE-2021-28254?

CVE-2021-28254 is a critical-severity vulnerability in Laravel, classified under Deserialization of Untrusted Data. CVSS score: 9.8/10. Published 2023-04-19.

How severe is CVE-2021-28254?

Critical severity. CVSS v3 base score is 9.8 out of 10.

Is CVE-2021-28254 known to be exploited?

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

Deserialization in Laravel

CVE-2021-28254

A deserialization vulnerability in the destruct() function of Laravel v8.5.9 allows attackers to execute arbitrary commands.

Vulnerability class: Insecure Deserialization

Published 2023-04-19 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 9.8 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.

EPSS exploit prediction

EPSS: 0.013 (69.7th percentile), scored 2026-09-30.

Low probability of exploitation in the next 30 days, but still tracked. 70th percentile — 69.7% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.013 · newest: 0.013 · change: 0.000

Affected products

Laravel — versions 8.5.9

Weakness classification (CWE)

CWE-502 — Deserialization of Untrusted Data

Public proof-of-concept exploits

References

s1mple-top.github.io/2021/03/09/Laravel8-new-pop-chain-mining-process/ (Exploit, Third Party Advisory)

Frequently asked questions

What is CVE-2021-28254?: CVE-2021-28254 is a critical-severity vulnerability in Laravel, classified under Deserialization of Untrusted Data. CVSS score: 9.8/10. Published 2023-04-19.
How severe is CVE-2021-28254?: Critical severity. CVSS v3 base score is 9.8 out of 10.
Is CVE-2021-28254 known to be exploited?: 2 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.