CVE-2021-47950

Advanced Guestbook 2.4.4 Persistent XSS via Smilies

CVSS 5.1 MEDIUMEPSS 0.2%CWE-79

Vexday Risk Score

33Attention

SSVC decision (CISA)

Attend

PoC available → attend closely

CVSS 5.1EPSS 0.2%KEV nãoPoC públicaNuclei —Metasploit —Patch —

Lifecycle

10 May 2026Published on NVD

Recommendation: Plan a near-term fix — a public PoC already exists.

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.

CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:P/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N

Affected products

Ampps · Advanced Guestbook

public PoCs found — 1

cve_referencewww.exploit-db.com/exploits/49875unverified

⚠ Public resources, to assess the exposure of systems you control or are authorized to test. Test only with authorization.

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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