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ExploitedIn CISA KEVFix available

CVE-2018-15133

Exploitation confirmed. First attested on 2024-01-16 by CISA-ADP, CISA KEV, GCVE · kevintel.

  • Published2018-08-09
  • WeaknessCWE-502

Am I affected?

With a domain, we read the version its public headers and pages expose. A distribution build can carry the fix under an older number.

Description

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.

Timeline

dates in UTC
  1. 2018-08-0919:29CVE publishedNVD
  2. 2019-07-16Exploit-DB entryExploit-DB
  3. 2024-01-16Added to the CISA KEV catalogCISA KEV
  4. 2024-01-16Listed as exploited by GCVEGCVE
  5. 2024-01-16Exploitation first reportedCISA KEV
  6. 2024-01-1718:05SSVC exploitation set to activeCISA-ADP

Observed activity

isMalicious corpus · updated 2026-11-03 15:37 UTC
Indicators tagged with this CVE, per day0 indicators over 7 days
Block these indicators
  • Firewall list (EDL, text): https://api.ismalicious.com/edl/cve/CVE-2018-15133?format=txt
  • CSV export: https://api.ismalicious.com/edl/cve/CVE-2018-15133?format=csv
  • TAXII collection of exploited CVEs
  • The EDL and CSV take an API key on the Pro plan.

Versions per branch

NVD · OSV
Laravel
BranchAffectedFixed in
5.5≤ 5.5.40no fix published
5.6≥ 5.6.0, ≤ 5.6.29no fix published
Laravel
BranchAffectedFixed in
5.6≥ 5.6.0, < 5.6.305.6.30
5.5≤ 5.5.40no fix published

as publishedRanges as NVD and OSV publish them; a distribution’s build can be fixed under an older number.

Distribution builds and vendor advisories

Packages from OSV.dev and products from the vendors' CSAF advisories.

version not verifiedVersions not verified: read as OSV.dev and the vendors publish them, not checked against each vendor's release list.

Packages

  • laravel/frameworkTuxCare:Packagistfrom 5.4.36 · fixed in 5.4.36-p2+tuxcare

Full record on NVD

Fix

  1. CISA’s required action: Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable.due 2024-02-06

Advisories and patches

Detection

read 2026-11-02 22:42 UTC
Nuclei template
none so far
ProjectDiscovery
Exploit-DB
EDB-47129
Exploit-DB
Proof-of-concept repositories
14 repositories, unverifiedkozmic/laravel-poc-CVE-2018-15133Bilelxdz/Laravel-CVE-2018-15133Prabesh01/Laravel-PHP-Unit-RCE-Auto-shell-uploaderbukitbarisan/laravel-rce-cve-2018-15133AlienX2001/better-poc-for-CVE-2018-15133
PoC-in-GitHub
Metasploit modules
1 moduleexploit/unix/http/laravel_token_unserialize_execrank: excellentModule metadata: Metasploit Framework, © Rapid7, Inc., BSD-3-Clause.
Metasploit Framework

CISA Known Exploited Vulnerability

Date Added
2024-01-16
Patch Due Date
2024-02-06
Ransomware Use
Unknown
Required Action
Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable.

Sources

Identifiers

Technical details

CVSS v3 Vector
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
Published
2018-08-09
Last Modified
2026-06-17
NVD status
Analyzed
GitHub Advisory
GHSA-qvqm-h22r-4cp9

Frequently asked questions

What is 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/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.

Is CVE-2018-15133 actively exploited?

Yes. CVE-2018-15133 is on the CISA Known Exploited Vulnerabilities (KEV) catalog, meaning it has been confirmed as actively exploited in the wild. CISA requires federal agencies to patch by 2024-02-06.

What is the CVSS score for CVE-2018-15133?

CVE-2018-15133 has a CVSS v3 base score of 8.1 (HIGH severity), with vector string CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H.

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Sources for this record