What is CVE-2018-15133?

CVE-2018-15133 is a high-severity vulnerability in Laravel, classified under Deserialization of Untrusted Data. CVSS score: 8.1/10. Published 2018-08-09.

How severe is CVE-2018-15133?

High severity. CVSS v3 base score is 8.1 out of 10.

Is CVE-2018-15133 known to be exploited?

Yes. CVE-2018-15133 is listed in the CISA Known Exploited Vulnerabilities catalog (added 2024-01-16), indicating it is being actively exploited. 43 public proof-of-concept repositories are indexed.

Deserialization in Laravel

CVE-2018-15133

In Laravel Framework through 5.5.40 and 5.6.x through 5.6.29, remote code execution might occur as a result of an unserialize call on a potentially untrusted X-XSRF-TOKEN value. This involves the decrypt method in Illuminate/Encryption/Enc…

Vulnerability class: Insecure Deserialization

EPSS: 0.768 (99.5th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 8.1 (High). Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H.

Affected products

Laravel
N/a — versions n/a

Weakness classification (CWE)

CWE-502 — Deserialization of Untrusted Data

CISA KEV (Known Exploited Vulnerabilities)

This CVE is on the CISA KEV catalog, added on 2024-01-16. CISA KEV inclusion means CISA has confirmed in-the-wild exploitation; US federal agencies are required to remediate within a published due date.

BOD 22-01 due date: 2024-02-06.

Required action: Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable.

Public proof-of-concept exploits

References

cve@mitre.org (x_refsource_CONFIRM, Vendor Advisory)
cve@mitre.org (Exploit, VDB Entry, Third Party Advisory, x_refsource_MISC)
134c704f-9b21-4f2e-91b3-4a467353bcc0 (US Government Resource)

Frequently asked questions

What is CVE-2018-15133?: CVE-2018-15133 is a high-severity vulnerability in Laravel, classified under Deserialization of Untrusted Data. CVSS score: 8.1/10. Published 2018-08-09.
How severe is CVE-2018-15133?: High severity. CVSS v3 base score is 8.1 out of 10.
Is CVE-2018-15133 known to be exploited?: Yes. CVE-2018-15133 is listed in the CISA Known Exploited Vulnerabilities catalog (added 2024-01-16), indicating it is being actively exploited. 43 public proof-of-concept repositories are indexed.