CVE-2025-53350Network attack vector

Browser script execution via undisclosed input reflection

Published Oct 22, 2025 · Updated Oct 22, 2025

Reflected XSS in webjunk Calendar Plus 1.2.4 and earlier allows remote attackers to execute script in a user's browser via a crafted request. The CNA and vendor entry do not identify the affected parameter, request handler, or output operation that reflects untrusted input without neutralization. Exploitation requires user interaction with a crafted request, and the resulting script runs in the affected site's browser context.

CVSS severity7.1
High
EPSS probability0.23%
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 webjunk Calendar Plus 1.2.4 and earlier allows remote attackers to execute script in a user's browser via a crafted request. The CNA and vendor entry do not identify the affected parameter, request handler, or output operation that reflects untrusted input without neutralization. Exploitation requires user interaction with a crafted request, and the resulting script runs in the affected site's browser context.

The record

CVE
CVE-2025-53350
Published
Oct 22, 2025
Updated
Oct 22, 2025
Vendor
webjunk
Product
Calendar Plus
Classifications
CWE-79, CAPEC-591, T1203
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Oct 22, 2025CVE publishedPublication date reported by the CVE source.
  2. Oct 22, 2025Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=n/a <=<= 1.2.4

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

webjunk · Calendar Plusversion=n/a <=<= 1.2.4

Published CVSS scores

7.1CISA-ADPCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:L

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.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

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 exploitUnconfirmed

Weakness, pattern, technique

CWE-79Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
CAPEC-591Reflected XSS
T1203Exploitation for Client Execution

Public exploit references

No public exploit references are available in this record.

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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