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Fencer Vulns
medium 6.1

CVE-2020-35416 json

Multiple cross-site scripting (XSS) vulnerabilities exist in PHPJabbers Appointment Scheduler 2.3, in the index.php admin login webpage (wi…

published 2020-12-15 5 y ago modified 2026-06-17 4 mo ago also EUVD-2020-23090

cvss
6.1
version 3.1, NVD
cisa kev
Not listed
not in CISA's catalog
epss
2.7%
EPSS 2.7% chance of exploitation in 30 days, percentile 86%
public exploits
1
Exploit-DB

Summary

Multiple cross-site scripting (XSS) vulnerabilities exist in PHPJabbers Appointment Scheduler 2.3, in the index.php admin login webpage (with different request parameters), allows remote attackers to inject arbitrary web script or HTML.

Timeline

  1. Published
  2. First public exploit (EDB-49281)

Exploit prediction

2.71% chance of exploitation in the next 30 days, higher than 86% of all scored CVEs (FIRST EPSS, 2026-11-08).

Exploits and checks

  • EDB-49281 PHPJabbers Appointment Scheduler 2.3 - Reflected XSS (Cross-Site Scripting) webapps, 2020-12-17
  • packetstormsecurity.com http://packetstormsecurity.com/files/160502/PHPJabbers-Appointment-Scheduler-2.3-Cross-Site-Scripting.html referenced PoC, tagged "exploit" by a source, unverified
  • packetstormsecurity.com http://packetstormsecurity.com/files/160600/PHPJabbers-Appointment-Scheduler-2.3-Cross-Site-Scripting.html referenced PoC, tagged "exploit" by a source, unverified

CVSS scores

assigned by version score vector
NVD 3.1 6.1 CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
NVD 2.0 4.3 AV:N/AC:M/Au:N/C:N/I:P/A:N

Classification

Weakness
  • CWE-79 Improper Neutralization of Input During Web Page Generation

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.