CVE-2021-45416Public exploitNetwork attack vector

Reflected XSS via unescaped course search input

Published Feb 1, 2022 · Updated Jul 9, 2026

Reflected XSS in RosarioSIS 8.2.1 allows remote attackers to inject arbitrary HTML through the Courses.php search_term parameter. Courses.php places the request value directly into the search field's value attribute without HTML-special-character encoding. A victim must open the crafted course-search page in a popup, allowing injected script to run in the victim's browser and alter displayed content.

CVSS severity6.1
Medium
EPSS probability2.33%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Reflected XSS in RosarioSIS 8.2.1 allows remote attackers to inject arbitrary HTML through the Courses.php search_term parameter. Courses.php places the request value directly into the search field's value attribute without HTML-special-character encoding. A victim must open the crafted course-search page in a popup, allowing injected script to run in the victim's browser and alter displayed content.

The record

CVE
CVE-2021-45416
Published
Feb 1, 2022
Updated
Jul 9, 2026
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-79, T1189
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Feb 1, 2022CVE publishedPublication date reported by the CVE source.
  2. Jul 9, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Affected buildAffected product and version details are unavailable.

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Affected products and versions are unavailable in this record.

Published CVSS scores

6.1NIST NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
4.3NIST NVDAV:N/AC:M/Au:N/C:N/I:P/A:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

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No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-79Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
T1189Drive-by Compromise

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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