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
Published Aug 9, 2018 ·Due Feb 6, 2024
8.1
HIGHCVSS 3.1
EPSS 76.81%
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.
Affected products
Remediation
No remediation recorded yet.
Metrics
No CVSS v4.0 score for this CVE.
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
No CVSS v3.0 score for this CVE.
AV:N/AC:M/Au:N/C:P/I:P/A:P
Date Added
Jan 16, 2024
Patch Due
Feb 6, 2024
Required Action
Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable.
CISA SSVC (Vulnrichment)
Stakeholder-Specific Vulnerability Categorization from CISA ADP.
Exploitation
ActiveAutomatable
NoTechnical Impact
TotalDecision
n/aAssessed Jan 17, 2024 · SSVC 2.0.3
Estimated probability of exploitation in the wild in the next 30 days (FIRST EPSS). As of Oct 1, 2026.
Score over time
2021–2026- EPSS v1
- EPSS v2
- EPSS v3
- EPSS v4
- EPSS v5
Percentile over time
- EPSS v1
- EPSS v2
- EPSS v3
- EPSS v4
- EPSS v5
Table of values (33 key points)
Flat stretches are collapsed; showing up to 120 newest points.
| Date | Score | Percentile | Model |
|---|---|---|---|
| Oct 1, 2026 | 76.81% (0.76814) | 99.53th | v5 (v2026.06.15) |
| Jun 15, 2026 | 76.81% (0.76814) | 99.49th | v5 (v2026.06.15) |
| Apr 21, 2026 | 84.45% (0.84447) | 99.33th | v4 (v2025.03.14) |
| Mar 27, 2026 | 83.31% (0.83311) | 99.26th | v4 (v2025.03.14) |
| Mar 1, 2026 | 84.38% (0.84383) | 99.31th | v4 (v2025.03.14) |
| Jan 18, 2026 | 85.57% (0.85570) | 99.34th | v4 (v2025.03.14) |
| Nov 21, 2025 | 84.55% (0.84553) | 99.28th | v4 (v2025.03.14) |
| Nov 18, 2025 | 93.36% (0.93364) | 99.87th | v4 (v2025.03.14) |
| Nov 8, 2025 | 84.55% (0.84553) | 99.28th | v4 (v2025.03.14) |
| Oct 22, 2025 | 82.97% (0.82973) | 99.20th | v4 (v2025.03.14) |
| Sep 8, 2025 | 80.23% (0.80228) | 99.09th | v4 (v2025.03.14) |
| Sep 3, 2025 | 81.52% (0.81518) | 99.15th | v4 (v2025.03.14) |
| Aug 16, 2025 | 82.89% (0.82891) | 99.20th | v4 (v2025.03.14) |
| Aug 3, 2025 | 81.76% (0.81762) | 99.15th | v4 (v2025.03.14) |
| Aug 2, 2025 | 83.04% (0.83039) | 99.22th | v4 (v2025.03.14) |
| Jul 31, 2025 | 87.00% (0.87001) | 99.40th | v4 (v2025.03.14) |
| Jul 19, 2025 | 84.96% (0.84960) | 99.29th | v4 (v2025.03.14) |
| Jul 18, 2025 | 81.66% (0.81663) | 99.12th | v4 (v2025.03.14) |
| Mar 19, 2025 | 80.23% (0.80228) | 99.06th | v4 (v2025.03.14) |
| Mar 17, 2025 | 77.08% (0.77081) | 98.92th | v4 (v2025.03.14) |
| Dec 17, 2024 | 88.38% (0.88380) | 98.94th | v3 (v2023.03.01) |
| Dec 12, 2024 | 96.26% (0.96264) | 99.60th | v3 (v2023.03.01) |
| Jul 19, 2024 | 96.79% (0.96788) | 99.70th | v3 (v2023.03.01) |
| Jun 18, 2024 | 96.90% (0.96898) | 99.72th | v3 (v2023.03.01) |
| Jun 11, 2024 | 96.77% (0.96767) | 99.68th | v3 (v2023.03.01) |
| Apr 24, 2024 | 64.96% (0.64965) | 97.86th | v3 (v2023.03.01) |
| Jan 17, 2024 | 62.42% (0.62418) | 97.55th | v3 (v2023.03.01) |
| Mar 7, 2023 | 14.42% (0.14422) | 94.82th | v3 (v2023.03.01) |
| Mar 6, 2023 | 23.85% (0.23850) | 96.74th | v2 (v2022.01.01) |
| Feb 4, 2022 | 23.85% (0.23850) | 95.09th | v2 (v2022.01.01) |
| Feb 3, 2022 | 31.60% (0.31602) | 96.85th | v1 |
| Sep 1, 2021 | 31.60% (0.31602) | 98.60th | v1 |
| Apr 14, 2021 | 31.60% (0.31602) | 0.00th | v1 |
References (7)
- http://packetstormsecurity.com/files/153641/PHP-Laravel-Framework-Token-Unserialize-Remote-Command-Execution.html x_refsource_MISCExploitThird Party AdvisoryVDB Entry
- https://github.com/advisories/GHSA-qvqm-h22r-4cp9 Advisory
- https://github.com/kozmic/laravel-poc-CVE-2018-15133
- https://github.com/laravel/framework/commit/d84cf988ed5d4661a4bf1fdcb08f5073835083a0
- https://laravel.com/docs/5.6/upgrade#upgrade-5.6.30 x_refsource_CONFIRMVendor Advisory
- https://nvd.nist.gov/vuln/detail/CVE-2018-15133
- https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2018-15133 government-resourceUS Government Resource
| Link | Providers | Tags |
|---|---|---|
| http://packetstormsecurity.com/files/153641/PHP-Laravel-Framework-Token-Unserialize-Remote-Command-Execution.html | x_refsource_MISCExploitThird Party AdvisoryVDB Entry | |
| https://github.com/advisories/GHSA-qvqm-h22r-4cp9 | Advisory | |
| https://github.com/kozmic/laravel-poc-CVE-2018-15133 | ||
| https://github.com/laravel/framework/commit/d84cf988ed5d4661a4bf1fdcb08f5073835083a0 | ||
| https://laravel.com/docs/5.6/upgrade#upgrade-5.6.30 | x_refsource_CONFIRMVendor Advisory | |
| https://nvd.nist.gov/vuln/detail/CVE-2018-15133 | ||
| https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2018-15133 | government-resourceUS Government Resource |
Change history (0)
No recorded changes yet.