CVE-2021-47950CWE-79

Advanced Guestbook 2.4.4 Persistent XSS via Smilies

Medium · published May 10, 2026

CVSS v4.0
5.1
EPSS
0%
Percentile
7.9
In the wild
Unconfirmed
What it is

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.

The record
Technical detail
CVSS v4.0
5.1 · MEDIUM
Vector
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
EPSS
0.00187 · 7.9th percentile
Weakness
CWE-79 · Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
Published
2026-05-10T12:52Z
EPSS history
Timeline
  • 10 MAY 12:52Z
    Advanced Guestbook 2.4.4 Persistent XSS via Smilies
    cvelistv5