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CVE-2020-18662

42
FAUCET Score

CVE-2020-18662 describes a critical SQL Injection vulnerability affecting gnuboard5 versions up to and including 5.3.2.8. This flaw allows an unauthenticated attacker to execute arbitrary SQL commands by manipulating the 'table_prefix' parameter in the install_db.php script. With a CVSS score of 9.8 (CRITICAL), successful exploitation can lead to complete compromise of confidentiality, integrity, and availability of the affected system. While not listed on CISA's KEV catalog, a public exploit is available on ExploitDB, indicating the potential for exploitation, though there is minimal community discussion or media coverage surrounding this CVE.

Impacted Technologies

VendorProductVersion(s)CPE
<= 5.3.2.8CPE matchmatch criteria
cpe:2.3:a:sir:gnuboard:*:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

9.8CRITICAL

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
Exploitability Score
3.9
Impact Score
5.9
CvssVersion
3.1

Exploit Intelligence

EPSS Score
5.38%
Probability of exploitation in next 30 days
EPSS Percentile
91.8%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
ExploitDB: EDB-52167 · Apr 11, 2025
This CVE's current EPSS score of 0.0538 is in the 86th percentile among its peer group of 36,862 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.1 Reddit, 0.3 Bluesky, 0.3 Mastodon, and 2.4 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.3 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Remediation records are not available for this CVE.

References

github.com / gnuboard/gnuboard5/issues/43
ExploitTechnical Description
github.com / LoRexxar/CVE_Request/tree/master/gnuboard5%20mul%20vuls%20before%20v5.3.2.8
Third Party Advisory
seebug.org / vuldb/ssvid-97927
Third Party Advisory