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CVE-2018-20587

21
FAUCET Score

CVE-2018-20587 describes an Incorrect Access Control vulnerability affecting Bitcoin Core versions 0.12.0 through 0.17.1 and Bitcoin Knots versions 0.12.0 through 0.17.x before 0.17.1.knots20181229. This medium-severity vulnerability (CVSS 5.5) allows a local attacker to steal currency by binding the RPC IPv4 localhost port and forwarding requests to the IPv6 localhost port, resulting in high integrity impact. There is no evidence of active exploitation, publicly available exploit code, or significant community discussion surrounding this CVE.

Impacted Technologies

VendorProductVersion(s)CPE
>= 0.12.0, <= 0.17.1CPE matchmatch criteria
cpe:2.3:a:bitcoin:bitcoin_core:*:*:*:*:*:*:*:*
>= 0.12.0, <= 0.17.0CPE matchmatch criteria
cpe:2.3:a:bitcoinknots:bitcoin_knots:*:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.0

5.5MEDIUM

CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N

Attack Vector
LOCAL
Attack Complexity
LOW
Privileges Required
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
HIGH
Availability Impact
NONE
Exploitability Score
1.8
Impact Score
3.6
CvssVersion
3.0

Exploit Intelligence

EPSS Score
0.35%
Probability of exploitation in next 30 days
EPSS Percentile
27.5%
Percentile rank of EPSS score among Peer Group
As of 2026-07-26
Model: v2026.06.15
This CVE's current EPSS score of 0.0035 is in the 84th percentile among its peer group of 15,937 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.0 Bluesky, 0.0 Mastodon, and 0.1 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.1 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Remediation records are not available for this CVE.

References

en.bitcoin.it / wiki/Common_Vulnerabilities_and_Exposures
Third Party Advisory
medium.com / %40lukedashjr/cve-2018-20587-advisory-and-full-disclosure-a3105551e78b