CVE-2025-48360Network attack vector

Stored script execution via undisclosed input handling

Published Aug 28, 2025 · Updated Apr 28, 2026

Stored XSS in Razvan Stanga Varnish/Nginx Proxy Caching 1.8.3 and earlier allows remote authenticated users to run script in browsers. Patchstack has not published the affected input, storage location, rendering path, or missing neutralization operation. Administrator privileges are required to plant the payload, and execution requires a user to view the stored content; browser-context access is the bounded consequence.

CVSS severity5.9
Medium
EPSS probability0.22%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Stored XSS in Razvan Stanga Varnish/Nginx Proxy Caching 1.8.3 and earlier allows remote authenticated users to run script in browsers. Patchstack has not published the affected input, storage location, rendering path, or missing neutralization operation. Administrator privileges are required to plant the payload, and execution requires a user to view the stored content; browser-context access is the bounded consequence.

The record

CVE
CVE-2025-48360
Published
Aug 28, 2025
Updated
Apr 28, 2026
Vendor
Razvan Stanga
Product
Varnish/Nginx Proxy Caching
Classifications
CWE-79, CAPEC-592, T1203
Attack vector
network
Privileges
admin

Timeline

How it unfolded

  1. Aug 28, 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 <=1.8.3

What conditions does exploitation require?

Attack vectornetwork
Required privilegesadmin

What is affected?

Razvan Stanga · Varnish/Nginx Proxy Cachingversion=0 <=1.8.3

Published CVSS scores

5.9PatchstackCVSS:3.1/AV:N/AC:L/PR:H/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
Privilegesadmin
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-79Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
CAPEC-592Stored 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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