CVE-2021-47950

medium

Published 2026-05-10 · Modified 2026-05-12

CVSS v3

6.4

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

CVSS v2

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VIR risk

6.4

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.

Predictions

Exploit likelihood

74%

Patch ETA

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Heuristic predictions, AS-IS, for prioritization only.

Mitigations

No vendor mitigations ingested yet for this CVE. The mitigation-content worker queues fetches as references arrive — check back in a few minutes, or see the references list below.

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

CWEs

CWE-79

Verify integrity in audit chain (admin only). AS-IS.