What’s Vulnerable › Vulnerabilities

CVE-2021-47950: Advanced Guestbook 2.4.4 Persistent XSS via Smilies

• Severity: medium (CVSS 6.4 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.2% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-05-10 · updated 2026-07-20
• Weakness: CWE-79

Description

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 can submit POST requests to admin.php with JavaScript code in the s_emotion field, which executes when administrators view the smilies tab.

Affected products

• Ampps Advanced Guestbook: 2.4.4

References

• https://www.ampps.com/apps/guestbooks/Advanced_Guestbook
• https://www.exploit-db.com/exploits/49875
• https://www.vulncheck.com/advisories/advanced-guestbook-persistent-xss-via-smilies

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