What’s Vulnerable › Vulnerabilities

CVE-2020-18663

• Severity: medium (CVSS 6.1 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 1.1% probability of exploitation in the next 30 days
• Public exploit or detection template: yes
• Published: 2021-06-24 · updated 2026-06-17
• Weakness: CWE-79

Description

Cross Site Scripting (XSS) vulnerability in gnuboard5 <=v5.3.2.8 via the act parameter in bbs/move_update.php.

Affected products

• gnuboard5: through 5.3.2.8

References

• https://github.com/LoRexxar/CVE_Request/tree/master/gnuboard5%20mul%20vuls%20before%20v5.3.2.8#reflective-xss-in-bbsmove_updatephp
• https://github.com/gnuboard/gnuboard5/issues/43
• https://www.seebug.org/vuldb/ssvid-97926
• https://github.com/LoRexxar/CVE_Request/tree/master/gnuboard5%20mul%20vuls%20before%20v5.3.2.8#reflective-xss-in-bbsmove_updatephp
• https://github.com/gnuboard/gnuboard5/issues/43
• https://www.seebug.org/vuldb/ssvid-97926

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