CVE-2020-24838: An integer overflow has been found in the the latest version of Issuer

This month

HIGH 7.5REMOTEMITIGATE

CVE-2020-24838 is a high-severity flaw (CVSS 7.5) affecting issuer. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

An integer overflow has been found in the the latest version of Issuer. The total issuedCount can be zero if the parameter is overly large. An attacker can obtain the private key of the owner issued with a certain 'amount', and the issuedCount can be zero if there is an overflow.

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	1.4% (top 28%)
CISA exploited list	No
Weakness	CWE-190
Published	2021-02-10
Last modified	2026-06-17

Publisher (CNA): MITRE · Vendor: issuer project

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

Am I affected?

Timeline

2021-02-10 16:15 UTCPublished CVE record published
2026-06-17 03:06 UTCUpdated Record last modified

issuer project issuer 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 issuer || rpm -q issuer || issuer --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-2020-24838?

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

Is CVE-2020-24838 being exploited?

CVE-2020-24838 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-2020-24838 affect?

CVE-2020-24838 affects issuer. Severity is high (CVSS 7.5). An integer overflow has been found in the the latest version of Issuer. The total issuedCount can be zero if the parameter is overly large. An attacker can obtain the private key of the owner issued with a certain 'amount', and the issuedCo

How urgent is CVE-2020-24838?

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

References

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