CVE-2025-55742Public exploitNetwork attack vector

Stored XSS via spoofed image MIME type

Published Aug 21, 2025 · Updated Aug 21, 2025

Stored XSS in UnoPim before 0.2.1 allows remote authenticated users to run script in an administrator's browser through a crafted profile image. The user-image sanitizer trusts the detected MIME type, so a GIF magic prefix lets an HTML file containing SVG script bypass SVG sanitization and remain stored. A victim administrator must open the uploaded image URL; the script then performs application actions with that administrator's session, while HttpOnly blocks direct cookie reads.

CVSS severity8.0
High
EPSS probability0.37%
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 UnoPim before 0.2.1 allows remote authenticated users to run script in an administrator's browser through a crafted profile image. The user-image sanitizer trusts the detected MIME type, so a GIF magic prefix lets an HTML file containing SVG script bypass SVG sanitization and remain stored. A victim administrator must open the uploaded image URL; the script then performs application actions with that administrator's session, while HttpOnly blocks direct cookie reads.

The record

CVE
CVE-2025-55742
Published
Aug 21, 2025
Updated
Aug 21, 2025
Vendor
Bagisto
Product
UnoPim
Classifications
CWE-79, CWE-20, T1059.007
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Aug 21, 2025CVE publishedPublication date reported by the CVE source.
  2. Aug 21, 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=< 0.2.1

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Bagisto · UnoPimversion=< 0.2.1

Published CVSS scores

4.8NIST National Vulnerability DatabaseCVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:C/C:L/I:L/A:N
8.0GitHub, Inc.CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:H

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
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-79Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
CWE-20Improper Input Validation
T1059.007Command and Scripting Interpreter: JavaScript/JScript

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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