How severe is CVE-2018-17987?

CVE-2018-17987 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity high, and availability none.

Is CVE-2018-17987 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (56th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2018-17987?

CVE-2018-17987 affects Hashheroes. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2018-17987?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.

When was CVE-2018-17987 published?

CVE-2018-17987 was published on 2018-12-26 and last updated on 2026-06-17.

CVE-2018-17987

CVE-2018-17987 is a high-severity vulnerability in Hashheroes with a CVSS 3.x base score of 7.5. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-330.

Key facts

Severity: High (CVSS 3.x base score 7.5)
CVSS v2: 5.0
EPSS exploit prediction: 1% (56th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-330
Affected product: Hashheroes
Published: 2018-12-26
Last modified: 2026-06-17

Description

The determineWinner function of a smart contract implementation for HashHeroes Tiles, an Ethereum game, uses a certain blockhash value in an attempt to generate a random number for the case where NUM_TILES equals the number of people who purchased a tile, which allows an attacker to control the awarding of the prize by being the last person to purchase a tile.

Frequently asked questions

What is CVE-2018-17987?: The determineWinner function of a smart contract implementation for HashHeroes Tiles, an Ethereum game, uses a certain blockhash value in an attempt to generate a random number for the case where NUM_TILES equals the number of people who purchased a tile, which allows an attacker to control the awarding of the prize by being the last person to purchase a tile.
How severe is CVE-2018-17987?: CVE-2018-17987 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity high, and availability none.
Is CVE-2018-17987 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (56th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2018-17987?: CVE-2018-17987 affects Hashheroes. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2018-17987?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
When was CVE-2018-17987 published?: CVE-2018-17987 was published on 2018-12-26 and last updated on 2026-06-17.

References

https://github.com/TEAM-C4B/CVE-LIST/tree/master/CVE-2018-17987

Affected products (1)

cpe:2.3:a:hashheroes:hashheroes:-:*:*:*:*:*:*:*

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