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CVE-2018-15133· NVD / CVE Program· CNA mitre

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 pote

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.

HighCVSS 8.1 · v3.1KEVWeaponized Fix available
Published
Aug 9, 2018
Updated
Jun 16, 2026
EPSS
76.8% · 100th percentile
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Action score

85

Now

Patch today or shut off access.

CVSS
32 / 40 · 8.1 / 10
CISA KEV
30 / 30 · Listed
EPSS
23 / 30 · 76.8%

CISA SSVC decision

Exploitation
active
Automatable
no
Technical impact
total

Vulnrichment: CISA's decision-tree inputs.

Actively exploited in the wild

CISA added this to its Known Exploited Vulnerabilities catalog on Jan 16, 2024. That signals real attacks, not theory.

Remediation deadline for government agencies: Feb 6, 2024.

Affected systems

VendorProduct
laravellaravel

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Affected versions

NVD version ranges (for catalog products). Add the product to your stack with a version and matching uses these.

  • laravel laravelup to 5.5.40 inclusive
  • laravel laravel5.6.0 and later · up to 5.6.29 inclusive

Package-level exposure

OSV and GitHub Advisory data: ecosystem, package and range. SBOM matching uses this table.

EcosystemPackageAffected rangeFix
Packagistlaravel/frameworkfrom 5.6.0 · before 5.6.305.6.30
Packagistlaravel/frameworkup to and including 5.5.40—

Same product

laravel: all records

Other highest-scoring records for the same primary product.

  • CVE-2021-3129Ignition before 2.5.2, as used in Laravel and other products, allows unauthenticated remote attackers to execute arbitrary code because of iKEV
    99Now
  • CVE-2017-16894In Laravel framework through 5.5.21, remote attackers can obtain sensitive information (such as externally usable passwords) via a direct re
    56Plan
  • CVE-2021-28254A deserialization vulnerability in the destruct() function of Laravel v8.5.9 allows attackers to execute arbitrary commands.
    39Monitor
  • CVE-2022-2870laravel deserialization
    39Monitor
  • CVE-2022-2886Laravel deserialization
    35Monitor
  • CVE-2020-24941An issue was discovered in Laravel before 6.18.35 and 7.x before 7.24.0.
    30Monitor

Remediation

Which version to upgrade to

Fix versions compiled from the vendor, package registries and Microsoft. Verify the vendor's note before upgrading.

Product / packageFixed versionSource
Packagist:laravel/framework5.6.30Package registry (OSV)

Exploit status

Weaponized

A ready exploit tool or active in-the-wild use is known for this vulnerability. This should be your top priority.

Evidence

  • Metasploit module ×1
  • Exploit-DB entry ×1
  • Proof-of-concept repository on GitHub ×14

Noroxi does not host or link to exploit code. Metasploit module names and Nuclei template ids are shown (names, not code); Exploit-DB entries and PoC repositories are given as counts only.

Public exploit evidence
SourceKindDate
Exploit-DB entryremote2019-07-16
Metasploit moduleexploit/unix/http/laravel_token_unserialize_execPHP Laravel Framework token Unserialize Remote Command Executionexploit2018-08-07
Proof-of-concept repository on GitHubstars:2602018-08-14
Proof-of-concept repository on GitHubstars:02020-02-25
Proof-of-concept repository on GitHubstars:62020-04-05
Proof-of-concept repository on GitHubstars:02020-04-27
Proof-of-concept repository on GitHubstars:02020-11-09
Proof-of-concept repository on GitHubstars:572020-11-13
Proof-of-concept repository on GitHubstars:352020-12-21
Proof-of-concept repository on GitHubstars:32021-01-03
Proof-of-concept repository on GitHubstars:02021-12-28
Proof-of-concept repository on GitHubstars:02023-05-10

Research context

For pentesters and researchers: attack profile, score disagreement, timeline, patch commits, credits, variant and chain candidates, bug bounty scope. All derived from existing data; no exploit code.

Timeline

From publication to today: proof of concept, Metasploit module, CISA KEV and fix record. Dates are as reported by the sources.

  1. Metasploit-3 d
  2. Published
  3. First PoC+4 d
  4. CISA KEV+1985 d
  5. TodaySep 30, 2026+2974 d
EPSS, last 120 days

FIRST EPSS daily score; only changes of 0.01 or more are recorded (step chart).

Patch and commit links

Commit, PR and diff links among the references. A starting point for patch-diffing and variant hunting; fixes, not exploits.

No commit or PR link among the references.

Credits

All researchers

Finders, reporters and analysts named in the CNA record. Click a name for that researcher’s other records.

No credits in the CNA record.

Variant candidates

Same product, same weakness class, within 18 months. If the patch missed the root cause, the sibling bug is here.

No nightly-computed relations.

Chain candidates

An authentication bypass and a privilege-requiring bug in the same product, published close together: combined they may become an unauthenticated path.

—

Bug bounty scope

No known public program.

Source: bounty-targets-data (public HackerOne, Bugcrowd, Intigriti, YesWeHack listings).

Technical details

Attack conditions

  • Anyone who can reach it over the internet can trigger it.
  • No account or password is required.
  • No user action is required.
  • Special conditions such as timing or configuration are required.

If successful

Confidentiality
high · data can be read
Integrity
high · data or configuration can be modified
Availability
high · the service can be disrupted
Attack vector
Network
Attack complexity
High
Privileges required
None
User interaction
None
Scope
Unchanged
Confidentiality impact
High
Integrity impact
High
Availability impact
High

Weakness class (CWE)

CWE-502 · Deserialization of Untrusted Data

CVSS vector

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

nvd-primary

Root cause

Data received over the network is deserialized into the language’s native object format without verifying its source. Code paths inside the object can be triggered during deserialization.

The bug in code

The whole CWE-502 class

A representative example of this vulnerability class. Not the vendor's source code; it shows the faulty pattern and its fix.

Vulnerable

python
payload = sock.recv(65536)job = pickle.loads(payload)

Fixed

python
payload = sock.recv(65536)if not hmac.compare_digest(sign(payload), header_sig):    raise PermissionError("invalid signature")job = JobSchema.validate(json.loads(payload))

Attack context

MITRE CAPEC attack patterns and ATT&CK techniques for this weakness class (CWE). A starting point for detection rules and threat hunting.

ATT&CK techniques

—

Noroxi analysis

No Noroxi analysis for this record yet

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Change log

  1. Fix✗ → ✓

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References

Vendor advisories and official records. Exploit/PoC links are deliberately left out.

All records