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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 gadget…

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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.
CVSS 8.1 (HIGH) KEV: KNOWN CATALOG

Attention and evidence

HYPE SCORE
0.0/10
REALITY · THREAT PRIORITY
8.6/10
General review priority; not probability

Evidence confidence: Exploitation recorded

Why this priority?
  • Recorded exploitation baseline: +7.00
  • Technical severity: CVSS 8.1: +1.21
  • Fresh EPSS: 76.57%: +0.38

General review priority, not probability, victim count or asset-specific risk. A range covers missing CVSS/EPSS inputs within the current evidence state.

Sources: 7 documents and public datasets.

Hype components

Headline sample (25%)
0/100
Press, 30 days (60%)
0/100
Grounded branding (15%)
0/100
HYPE TOTAL0/100

Sources and documents

Barracuda Networks Blog
Press · 03 Sep 2026, 07:00 · Threat Spotlight: How attackers are targeting your web applications right now - Barracuda Networks Blog
The Hacker News
Press · 12 Jul 2025, 07:00 · Over 600 Laravel Apps Exposed to Remote Code Execution Due to Leaked APP_KEYs on GitHub - The Hacker News
GitGuardian Blog
Press · 10 Jul 2025, 07:00 · Exploiting Public APP_KEY Leaks to Achieve RCE in Hundreds of Laravel Applications - GitGuardian Blog
The Hacker News
Press · 21 Mar 2024, 07:00 · AndroxGh0st Malware Targets Laravel Apps to Steal Cloud Credentials - The Hacker News
Infosecurity Magazine
Press · 17 Jan 2024, 08:00 · US Government Urges Action to Mitigate Androxgh0st Malware Threat - Infosecurity Magazine
See all 7 source documents
The Record from Recorded Future News
Press · 16 Jan 2024, 08:00 · Androxgh0st malware hackers creating large botnet, CISA and FBI warn - The Record from Recorded Future News
BleepingComputer
Press · 16 Jan 2024, 08:00 · FBI: Androxgh0st malware botnet steals AWS, Microsoft credentials - BleepingComputer

Score evolution

● Hype   ● Reality

Earlier evidence-support scores are retained in history; this chart shows only the current priority definition.

First record: hype 0.0 · reality 8.6 (2026-11-02 15:12). The curve appears once the score changes.

Public exploit evidence

3

Public exploit entries / repo candidates

See 3 repos with metrics
RepositoryStarsForksLanguageUpdated
kozmic/laravel-poc-CVE-2018-1513325836Dockerfile10 Mar 2024, 19:29
AlienX2001/better-poc-for-CVE-2018-1513300PHP05 Dec 2020, 11:01
Loaxert/CVE-2018-15133-PoC00Python19 Nov 2025, 23:27
Public exploit evidence
Evidence context and dated references

Reality is general threat/review priority, combining observed exploitation, CVSS severity and fresh EPSS. Evidence confidence is separate. This is not calibrated risk, a victim count or an asset-specific assessment. A range reflects missing numeric inputs.

Evidence in context

Confidence in exploitation evidence
Exploitation recorded
Priority basis
Recorded exploitation; CVSS 8.1; EPSS 76.6%
Attention, last 30 days
0 distinct story titles; 0 press documents; 0 publisher domains.
Technical potential
network access, no prior privileges, no user interaction, additional attack conditions.
Observed activity
Exploitation recorded in CISA KEV.
Known scale
Not quantified.
Evidence confidence basis
Trusted exploitation confirmation

Score evaluated: 2026-11-05 13:57:57.542231+00:00 · EPSS snapshot: 2026-11-05T12:03:04Z

Source event timeline
Published
09 Aug 2018, 19:00
Added to the CISA KEV catalog
16 Jan 2024, 00:00
First press mention
16 Jan 2024, 08:00
Latest press mention
03 Sep 2026, 07:00
Score calculated
05 Nov 2026, 13:57
PoCs on GitHub
3 repositories