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Fencer Intel
medium 4.8

CVE-2021-24664 json

WPSchoolPress < 2.1.17 - Multiple Admin+ Stored Cross-Site Scripting

published 5y ago modified 4mo ago also EUVD-2021-11576

cvss
4.8
version 3.1, NVD
cisa kev
Not listed
not in CISA's catalog
epss
2.4%
EPSS 2.4% chance of exploitation in 30 days, percentile 83%
public exploits
1
Exploit-DB

Summary

The School Management System – WPSchoolPress WordPress plugin before 2.1.17 sanitise some fields using sanitize_text_field() but does not escape them before outputting in attributes, resulting in Stored Cross-Site Scripting issues.

Patch / fix

  • igexsolutions wpschoolpress 2.1.17

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Timeline

  1. Published
  2. First public exploit (EDB-50520)

Exploit prediction

2.36% chance of exploitation in the next 30 days, higher than 83% of all scored CVEs (FIRST EPSS, 2026-11-09).

Exploits and checks

  • EDB-50520 WordPress Plugin WPSchoolPress 2.1.16 - 'Multiple' Cross Site Scripting (XSS) webapps, 2021-11-15
  • wpscan.com https://wpscan.com/vulnerability/3f8e170c-6579-4b1a-a1ac-7d93da17b669 referenced PoC, tagged "exploit" by a source, unverified

CVSS scores

assigned by version score vector
NVD 3.1 4.8 CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:C/C:L/I:L/A:N
NVD 2.0 3.5 AV:N/AC:M/Au:S/C:N/I:P/A:N

Affected products

  • Unknown School Management System – WPSchoolPress

Classification

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

References

Sources

Fencer Intel 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.