CVE-2018-15133

8.1 HIGH 77% exploit odds exploited in the wild Fix listed Code execution Web app

What it is

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/Encrypter.php and PendingBroadcast in gadgetchains/Laravel/RCE/3/chain.php in phpggc. The attacker must know the application key, which normally would never occur, but could happen if the attacker previously had privileged access or successfully accomplished a previous attack.

At a glance

Exploitability: Can be exploited over the network without logging in. High risk of data exposure, data tampering, service disruption.
In the wild: CISA lists this as exploited in real attacks. Treat as urgent.
Fix: A patch, advisory or fixed version is referenced. Upgrade or apply it.

Timeline

2018-08-07 00:00 UTC ReservedThe CVE id was reserved by its CNA
2018-08-09 19:29 UTC PublishedDisclosed publicly on CVE.org and NVD
2024-01-16 Exploited in the wildAdded to CISA's Known Exploited Vulnerabilities list
2024-02-06 Remediation deadlineCISA's due date for federal agencies to fix it
2026-06-17 01:42 UTC Last updatedMost recent change to the record

Why it ranks here

Exploited in the wild: yes, CISA lists it. This puts it above everything that is not.
Exploit odds: 76.6% in the next 30 days (EPSS).
Severity: 8.1 HIGH (CVSS).
Fix: a patch or advisory is linked.

Details

Published: 2018-08-09 19:29 UTC
Last modified: 2026-06-17 01:42 UTC
Added to CISA KEV: 2024-01-16
Exploit probability: 76.6% · EPSS, next 30 days
Weakness: CWE-502 · Unsafe deserialization
Record status: Analyzed

Affected

Laravel ≤ 5.5.40
Laravel ≤ 5.6.29

Attack profile CVSS 3.1 · 8.1

Attack vector: Network
Complexity: High
Privileges needed: None
User interaction: None
Scope: Unchanged
Confidentiality: High
Integrity: High
Availability: High

Raw vector

CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H

Is it in your code?

Hand this to your coding agent. It searches your project for the affected products and checks versions. Nothing leaves your machine.

Read https://cve-list.com/agent/cve/CVE-2018-15133.md and follow it. Check whether this project is affected by CVE-2018-15133. Read only. Don't change anything and don't upload my code. Tell me yes, no or not sure, with the file as proof.

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Fix and advisories

References

NVD record · CVE.org record