CVE-2018-12454: The _addguess function of a simplelottery smart contract implementation for 1000 Guess, an Ethereum gambling g

This month

HIGH 7.5REMOTEMITIGATE

CVE-2018-12454 is a high-severity flaw (CVSS 7.5) affecting 1000 guess. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

The _addguess function of a simplelottery smart contract implementation for 1000 Guess, an Ethereum gambling 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, it allows attackers to always win and get rewards.

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	1.3% (top 31%)
CISA exploited list	No
Weakness	CWE-338
Published	2018-06-17
Last modified	2026-06-17

Publisher (CNA): MITRE · Vendor: 1000guess

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

Am I affected?

Timeline

2018-06-17 12:29 UTCPublished CVE record published
2026-06-17 01:37 UTCUpdated Record last modified

1000guess 1000 guess 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 1000-guess || rpm -q 1000-guess || 1000-guess --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-2018-12454?

1000 guess: mitigate or apply the listed mitigation. Exact commands for each OS are on this page.

Is CVE-2018-12454 being exploited?

CVE-2018-12454 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-2018-12454 affect?

CVE-2018-12454 affects 1000 guess. Severity is high (CVSS 7.5). The _addguess function of a simplelottery smart contract implementation for 1000 Guess, an Ethereum gambling game, generates a random value with publicly readable variables such as the current block information and a private variable (which

How urgent is CVE-2018-12454?

Priority 49/100. High severity; Remotely exploitable, no login, no user action

References

← Back to latest CVEs