CVE-2018-12885: The randMod() function of the smart contract implementation for MyCryptoChamp, an Ethereum game, generates a r

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MEDIUM 5.9REMOTEMITIGATE

CVE-2018-12885 is a medium-severity flaw (CVSS 5.9) affecting mycryptochamp. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

The randMod() function of the smart contract implementation for MyCryptoChamp, an Ethereum game, generates a random value with publicly readable variables such as the current block information and a private variable, (which can be read with a getStorageAt call). Therefore, attackers can get powerful champs/items and get rewards.

Why this priority

Public exploit reference
Remotely exploitable, no login, no user action

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

Risk facts

CVSS score	5.9 (Medium)
Attack vector	Network (remote)
Attack complexity	High
Privileges needed	None
User interaction	None
EPSS exploit chance	1.4% (top 28%)
CISA exploited list	No
Weakness	CWE-338
Published	2018-08-07
Last modified	2026-06-17

Publisher (CNA): MITRE · Vendor: mycryptochamp

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

Am I affected?

Timeline

2018-08-07 15:29 UTCPublished CVE record published
2026-06-17 01:38 UTCUpdated Record last modified

mycryptochamp mycryptochamp 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 mycryptochamp || rpm -q mycryptochamp || mycryptochamp --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-2018-12885?

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

Is CVE-2018-12885 being exploited?

CVE-2018-12885 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-2018-12885 affect?

CVE-2018-12885 affects mycryptochamp. Severity is medium (CVSS 5.9). The randMod() function of the smart contract implementation for MyCryptoChamp, an Ethereum game, generates a random value with publicly readable variables such as the current block information and a private variable, (which can be read with

How urgent is CVE-2018-12885?

Priority 49/100. Public exploit reference; Remotely exploitable, no login, no user action

References

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