CVE-2021-47950

MEDIUM 6.4

Advanced Guestbook 2.4.4 Persistent XSS via Smilies

CVSS Score

6.4

EPSS Score

0.0%

EPSS Percentile

8th

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.

CWE	CWE-79
Vendor	ampps
Product	advanced guestbook
Published	May 10, 2026
Last Updated	May 12, 2026

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CVSS v3 Breakdown

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N

Attack Vector

Network

Attack Complexity

Low

Privileges Required

Low

User Interaction

None

Scope

Changed

Confidentiality

None

Integrity

None

Availability

None

Affected Versions

Ampps / Advanced Guestbook

2.4.4

References

NVD ↗ CVE.org ↗ EPSS Data ↗

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

Credits

Abdulkadir AYDOGAN