CVE-2021-3831

Cross-site Scripting (XSS) - Reflected in gnuboard/gnuboard5

gnuboard5 is vulnerable to Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')

Affected

gnuboard · gnuboard/gnuboard5

CVSS v3.1 NVD

6.1 MEDIUMCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N

CVSS v3.0 HUNTR

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

CVSS v2.0 NVD

4.3 MEDIUMAV:N/AC:M/Au:N/C:N/I:P/A:N

EPSS

1.84% chance of exploitation in the next 30 days, 79th percentile

Nuclei

medium · CWE-80

Published

2021-12-14

Updated

2024-08-03

Proof-of-concept exploits (2)

• https://huntr.dev/bounties/25775287-88cd-4f00-b978-692d627dff04
• aratane/CVE-2021-38310★ · 2024-10-24

Nuclei templates (1)

• projectdiscovery/nuclei-templates/blob/main/http/cves/2021/CVE-2021-3831.yaml

Security advisories

• gnuboard/gnuboard5/commit/2e81619ea87bc9c0b4a073d8df3c7693a6fdbf0d

References

• CVE Record
• NVD entry

Related

• CVE-2024-9474
• CVE-2026-42945