CVE-2025-30962Network attack vector

Script execution via unescaped reflected request input

Published Apr 15, 2025 · Updated Apr 28, 2026

Reflected XSS in FS Code FS Poster 6.5.8 and earlier allows remote attackers to execute arbitrary scripts through a crafted link. Affected request input is returned to a generated WordPress page without sufficient sanitization or output escaping; public sources do not identify the parameter or code locus. Exploitation is unauthenticated but requires a privileged user to open the crafted link or page, exposing the visitor's browser session to script-controlled data access and actions.

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 FS Code FS Poster 6.5.8 and earlier allows remote attackers to execute arbitrary scripts through a crafted link. Affected request input is returned to a generated WordPress page without sufficient sanitization or output escaping; public sources do not identify the parameter or code locus. Exploitation is unauthenticated but requires a privileged user to open the crafted link or page, exposing the visitor's browser session to script-controlled data access and actions.

The record

CVE
CVE-2025-30962
Published
Apr 15, 2025
Updated
Apr 28, 2026
Vendor
FS Code
Product
FS Poster
Classifications
CWE-79, T1203
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Apr 15, 2025CVE publishedPublication date reported by the CVE source.
  2. Apr 28, 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?

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

  1. Affected versionversion=0 <=6.5.8 changes=[{"at":"6.5.9","status":"unaffected"}]

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

FS Code · FS Posterversion=0 <=6.5.8 changes=[{"at":"6.5.9","status":"unaffected"}]

Published CVSS scores

7.1PatchstackCVSS: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 9, 2026Sep 15, 2026
Latest reporting daySep 15, 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')
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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