CVE-2020-20178: Ethereum 0xe933c0cd9784414d5f278c114904f5a84b396919#code.sol latest version is affected by a denial of service

This month

HIGH 7.5REMOTEMITIGATE

CVE-2020-20178 is a high-severity flaw (CVSS 7.5) affecting whohas. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Ethereum 0xe933c0cd9784414d5f278c114904f5a84b396919#code.sol latest version is affected by a denial of service vulnerability in the affected payout function. Once the length of this array is too long, it will result in an exception. Attackers can make attacks by creating a series of account addresses.

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 35%)
CISA exploited list	No
Published	2021-05-24
Last modified	2026-06-17

Publisher (CNA): MITRE · Vendor: whohas project

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

Am I affected?

Timeline

2021-05-24 19:15 UTCPublished CVE record published
2026-06-17 03:02 UTCUpdated Record last modified

whohas project whohas 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 whohas || rpm -q whohas || whohas --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-2020-20178?

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

Is CVE-2020-20178 being exploited?

CVE-2020-20178 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-2020-20178 affect?

CVE-2020-20178 affects whohas. Severity is high (CVSS 7.5). Ethereum 0xe933c0cd9784414d5f278c114904f5a84b396919#code.sol latest version is affected by a denial of service vulnerability in the affected payout function. Once the length of this array is too long, it will result in an exception. Attacke

How urgent is CVE-2020-20178?

Priority 48/100. High severity; Remotely exploitable, no login, no user action

Related CVEs

CVE-2021-4258 LOW 3.7 UPGRADE A vulnerability was found in whohas

References

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