CVE-2024-55556

CRITICALNVD 9.89.8—
EchelonGraph scoreMEDIUM confidence

Score 9.8 from GitHub Security Advisory (severity: CRITICAL) published 2025-01-07. NVD baseline CVSS 9.8; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, nvd
Weaponized
9.8
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS: 44%CVSS: 9.8Exploit: NoneExposed: 0

No vendor fix yet — apply a workaround or compensating control (WAF / firewall / segmentation) and watch for a patch.

A vulnerability in Crater Invoice allows an unauthenticated attacker with knowledge of the APP_KEY to achieve remote command execution on the server by manipulating the laravel_session cookie, exploiting arbitrary deserialization through the encrypted session data. The exploitation vector of this vulnerability relies on an attacker obtaining Laravel's secret APP_KEY, which would allow them to decrypt and manipulate session cookies (laravel_session) containing serialized data. By altering this data and re-encrypting it with the APP_KEY, the attacker could trigger arbitrary deserialization on the server, potentially leading to remote command execution (RCE). The vulnerability is primarily exploited by accessing an exposed cookie and manipulating it using the secret key to gain malicious access to the server.

CVSS v3
9.8
EG Score
9.8(medium)
EG Risk
85(Attend)
EG Risk 85/100SSVC: Attend

EG Risk is EchelonGraph's 0–100 priority score: it fuses intrinsic severity with real-world exploitation and automatability so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner. Distinct from the 0–10 EG Score (severity).

How it’s computed
Severity98% × 45%
Exploitation65% × 40%
Automatability100% × 15%
Action: Remediate soon — notable exploitation risk.
EPSS
98.6%
KEV
Not listed

Published

January 7, 2025

Last Modified

April 15, 2026

Advisory Details (3)

Auto-updated May 19, 2026
🔬 Proof of concept available. No patch confirmed yet.
generic🟡 PoC Available

Crater Invoice - Unauthenticated Remote Command Execution when APP_KEY

https://www.synacktiv.com/advisories/crater-invoice-unauthenticated-remote-command-execution-when-appkey-known
generic

Pentest, Reverse, Développement

https://www.synacktiv.com/
generic

GitHub - crater-invoice-inc/crater: Open Source Invoicing Solution for Individuals & Businesses · GitHub

https://github.com/crater-invoice/crater

Weakness Classification(1)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

Data Freshness Timeline

(refreshed 10× in last 7d / 31× in last 30d)

Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. Most recent first.

  1. 2026-07-24 14:16 UTCEPSS rescore
  2. 2026-07-23 02:44 UTCEG score recompute
  3. 2026-07-22 14:07 UTCEPSS rescore
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  24. 2026-06-10 22:18 UTCEPSS rescore
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  27. 2026-06-08 14:16 UTCEPSS rescore
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  29. 2026-06-05 22:46 UTCEPSS rescore
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  46. 2026-05-22 21:16 UTCEPSS rescore
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  55. 2026-05-20 11:31 UTCEG score recompute
  56. 2026-05-20 11:31 UTCGHSA enrichment
  57. 2026-05-18 21:30 UTCEPSS rescore
  58. 2026-05-18 21:30 UTCEPSS rescore

Publicly available exploits

(1 reference)

Working exploit code is in the public domain (1 Metasploit module). Defenders should treat patch urgency accordingly — public PoCs typically lead to mass-exploitation within 24-72 hours.

  • Metasploitexploit/linux/http/invoiceshelf_unauth_rce_cve_2024_55556✓ verified
    First seen Dec 13, 2024

    InvoiceShelf unauthenticated PHP Deserialization Vulnerability

    Open source ↗

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2024-55556?
CVE-2024-55556 is a critical vulnerability published on January 7, 2025. A vulnerability in Crater Invoice allows an unauthenticated attacker with knowledge of the APPKEY to achieve remote command execution on the server by manipulating the laravelsession cookie, exploiting arbitrary deserialization through the encrypted session data. The exploitation vector of this…
When was CVE-2024-55556 disclosed?
CVE-2024-55556 was first published in the National Vulnerability Database on January 7, 2025, with the most recent update on April 15, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2024-55556 actively exploited?
CVE-2024-55556 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 98.6% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
What is the CVSS score of CVE-2024-55556?
CVE-2024-55556 has a CVSS v3 base score of 9.8 (NVD).
How do I remediate CVE-2024-55556?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2024-55556, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

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