CVE-2020-18662
CVE-2020-18662 is a critical-severity vulnerability in Sir Gnuboard with a CVSS 3.x base score of 9.8. 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-89.
Key facts
- Severity: Critical (CVSS 3.x base score 9.8)
- CVSS v2: 7.5
- EPSS exploit prediction: 5% (93rd percentile)
- Actively exploited: Not listed in CISA KEV
- Weakness: CWE-89
- Affected product: Sir Gnuboard
- Published:
- Last modified:
Description
SQL Injection vulnerability in gnuboard5 <=v5.3.2.8 via the table_prefix parameter in install_db.php.
Frequently asked questions
- What is CVE-2020-18662?
- SQL Injection vulnerability in gnuboard5 <=v5.3.2.8 via the table_prefix parameter in install_db.php.
- How severe is CVE-2020-18662?
- CVE-2020-18662 has a CVSS 3.x base score of 9.8, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
- Is CVE-2020-18662 being actively exploited?
- It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 5% (93rd percentile), an estimate of the probability of exploitation in the next 30 days.
- What products are affected by CVE-2020-18662?
- CVE-2020-18662 affects Sir Gnuboard. See the affected-products list for the exact vulnerable versions.
- How do I fix CVE-2020-18662?
- Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.
- When was CVE-2020-18662 published?
- CVE-2020-18662 was published on 2021-06-24 and last updated on 2026-06-17.
References
- https://github.com/LoRexxar/CVE_Request/tree/master/gnuboard5%20mul%20vuls%20before%20v5.3.2.8#sql-injection-in-install_dbphp
- https://github.com/gnuboard/gnuboard5/issues/43
- https://www.seebug.org/vuldb/ssvid-97927
Affected products (1)
- cpe:2.3:a:sir:gnuboard:*:*:*:*:*:*:*:*
More vulnerabilities in Sir Gnuboard
- CVE-2005-0269 — Critical (CVSS 9.8): The file extension check in GNUBoard 3.40 and earlier only verifies extensions that contain all lowercase letters,…
- CVE-2024-41475 — High (CVSS 8.8): Gnuboard g6 6.0.7 is vulnerable to Session hijacking due to a CORS misconfiguration.
- CVE-2022-1252 — High (CVSS 8.2): Use of a Broken or Risky Cryptographic Algorithm in GitHub repository gnuboard/gnuboard5 prior to and including 5.5.5.…
- CVE-2022-44216 — High (CVSS 7.5): Gnuboard 5.5.4 and 5.5.5 is vulnerable to Insecure Permissions. An attacker can change password of all users without…
- CVE-2011-4066 — High (CVSS 7.5): SQL injection vulnerability in bbs/tb.php in Gnuboard 4.33.02 and earlier allows remote attackers to execute arbitrary…
- CVE-2004-1403 — High (CVSS 7.5): PHP remote file inclusion vulnerability in index.php in GNUBoard 3.39 and earlier allows remote attackers to execute…
All CVEs affecting Sir Gnuboard →
Other CWE-89 (SQL Injection) vulnerabilities
- CVE-2026-79849 — Critical (CVSS 10.0): Vulnerabilities in the affected interface of AOS-8 could allow an unauthenticated remote attacker to conduct SQL…
- CVE-2026-79848 — Critical (CVSS 10.0): Vulnerabilities in the affected interface of AOS-8 could allow an unauthenticated remote attacker to conduct SQL…
- CVE-2026-55572 — Critical (CVSS 10.0): e107 is a content management system (CMS). Prior to 2.3.7, the bundled alt_auth plugin's otherdb and e107db…
- CVE-2026-12260 — Critical (CVSS 10.0): SQL injection in the NetBoard CRM demo platform; specifically, the vulnerable component is the ‘user-name’ POST…
- CVE-2026-74820 — Critical (CVSS 10.0): ServiceNow has remediated a SQL injection vulnerability that was identified in in the ServiceNow AI platform. This…
- CVE-2026-20030 — Critical (CVSS 10.0): As part of Cisco's ongoing commitment to proactive security and product quality, the Cisco Crosswork engineering team…