What is CVE-2021-47950?

CVE-2021-47950 is a medium-severity vulnerability in Ampps Advanced Guestbook, classified under Cross-site Scripting. CVSS score: 6.4/10. Published 2026-05-10.

How severe is CVE-2021-47950?

Medium severity. CVSS v3 base score is 6.4 out of 10.

XSS in Ampps Advanced Guestbook

CVE-2021-47950

Advanced Guestbook 2.4.4 contains a persistent cross-site scripting vulnerability in the smilies administration interface that allows authenticated attackers to inject malicious scripts by manipulating the s_emotion parameter. Attackers ca…

Vulnerability class: XSS (Cross-Site Scripting)

EPSS: 0.000 (9.7th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 6.4 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N.

Affected products

Ampps Advanced Guestbook — versions 2.4.4

Weakness classification (CWE)

CWE-79 — Cross-site Scripting

References

ExploitDB-49875 (exploit)
Official Product Homepage (product)
VulnCheck Advisory: Advanced Guestbook 2.4.4 Persistent XSS via Smilies (third-party-advisory)

Frequently asked questions

What is CVE-2021-47950?: CVE-2021-47950 is a medium-severity vulnerability in Ampps Advanced Guestbook, classified under Cross-site Scripting. CVSS score: 6.4/10. Published 2026-05-10.
How severe is CVE-2021-47950?: Medium severity. CVSS v3 base score is 6.4 out of 10.