CVE-2018-13877: The doPayouts() function of the smart contract implementation for MegaCryptoPolis, an Ethereum game, has a Den

This month

HIGH 7.5REMOTEMITIGATE

CVE-2018-13877 is a high-severity flaw (CVSS 7.5) affecting megacryptopolis. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

The doPayouts() function of the smart contract implementation for MegaCryptoPolis, an Ethereum game, has a Denial of Service vulnerability. If a smart contract that has a fallback function always causing exceptions buys a land, users cannot buy lands near that contract's land, because those purchase attempts will not be completed unless the doPayouts() function successfully sends Ether to certain neighbors.

Why this priority

High severity
Remotely exploitable, no login, no user action

No fix is published yet: follow the downgrade or mitigation steps.

Risk facts

CVSS score	7.5 (High)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	None
EPSS exploit chance	1.1% (top 36%)
CISA exploited list	No
Weakness	CWE-20
Published	2018-08-06
Last modified	2026-06-17

Publisher (CNA): MITRE · Vendor: megacryptopolis

Last updated 2026-06-17 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2018-08-06 20:29 UTCPublished CVE record published
2026-06-17 01:40 UTCUpdated Record last modified

megacryptopolis megacryptopolis MITIGATE

Affected: all versions

Fixed in: no fixed release known

Safe to downgrade to: no unaffected older release

1. Check installed version

apt-cache policy megacryptopolis || rpm -q megacryptopolis || megacryptopolis --version

No fixed or unaffected release known

Apply the vendor mitigation from the advisory, disable the affected feature, or restrict network access.

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2018-13877?

megacryptopolis: mitigate or apply the listed mitigation. Exact commands for each OS are on this page.

Is CVE-2018-13877 being exploited?

CVE-2018-13877 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2018-13877 affect?

CVE-2018-13877 affects megacryptopolis. Severity is high (CVSS 7.5). The doPayouts() function of the smart contract implementation for MegaCryptoPolis, an Ethereum game, has a Denial of Service vulnerability. If a smart contract that has a fallback function always causing exceptions buys a land, users cannot

How urgent is CVE-2018-13877?

Priority 47/100. High severity; Remotely exploitable, no login, no user action

References

← Back to latest CVEs