CVE-2025-49048Network attack vector

Administrator-level stored XSS via insufficient output escaping

Published Aug 14, 2025 · Updated Apr 28, 2026

Stored XSS in Inspectlet – User Session Recording and Heatmaps 2.0 and earlier allows remote authenticated users to inject browser scripts. Public sources do not name the affected input or rendering function; they establish that input is stored without sufficient sanitization and later emitted without output escaping. Execution requires administrator-level access, a multisite installation or disabled unfiltered_html, and a later page view.

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 Inspectlet – User Session Recording and Heatmaps 2.0 and earlier allows remote authenticated users to inject browser scripts. Public sources do not name the affected input or rendering function; they establish that input is stored without sufficient sanitization and later emitted without output escaping. Execution requires administrator-level access, a multisite installation or disabled unfiltered_html, and a later page view.

The record

CVE
CVE-2025-49048
Published
Aug 14, 2025
Updated
Apr 28, 2026
Vendor
Inspectlet
Product
Inspectlet
Classifications
CWE-79, T1059.007
Attack vector
network
Privileges
admin

Timeline

How it unfolded

  1. Aug 14, 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

Compare your product and version with the public record. A matching version still requires validation against your environment.

Is a vulnerable build present?

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

  1. Affected versionversion=0 <=2.0 changes=[{"at":"3.0","status":"unaffected"}]

What conditions does exploitation require?

Attack vectornetwork
Required privilegesadmin

What is affected?

Inspectlet · Inspectletversion=0 <=2.0 changes=[{"at":"3.0","status":"unaffected"}]

Published CVSS scores

5.9PatchstackCVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:C/C:L/I:L/A:L
4.4WordfenceCVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:C/C:L/I:L/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.

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
Privilegesadmin
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-79Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
T1059.007JavaScript/JScript

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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