CVE-2025-15095Public exploitNetwork attack vector

Reflected XSS via unescaped base64 output

Published Dec 26, 2025 · Updated Dec 26, 2025

Reflected XSS in Postman httpbin 0.6.0 through 0.6.1 allows remote authenticated users to execute script via a crafted /base64 URL. The decode_base64 route decodes the path value and returns it directly as text/html without escaping, making supplied markup executable page content. Exploitation requires another user to open the crafted URL, and the script then runs in that user's browser under the httpbin origin.

CVSS severity3.5
Low
EPSS probability0.29%
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 Postman httpbin 0.6.0 through 0.6.1 allows remote authenticated users to execute script via a crafted /base64 URL. The decode_base64 route decodes the path value and returns it directly as text/html without escaping, making supplied markup executable page content. Exploitation requires another user to open the crafted URL, and the script then runs in that user's browser under the httpbin origin.

The record

CVE
CVE-2025-15095
Published
Dec 26, 2025
Updated
Dec 26, 2025
Vendor
Postman
Product
httpbin
Classifications
CWE-79, CWE-94, T1203
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Dec 26, 2025CVE publishedPublication date reported by the CVE source.
  2. Dec 26, 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=0.6.0
  2. Affected versionversion=0.6.1

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Postman · httpbinversion=0.6.0; version=0.6.1

Published CVSS scores

2.0VulDBCVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:P/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N/E:P
4.0VulDBAV:N/AC:L/Au:S/C:N/I:P/A:N
3.5VulDBCVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:N/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 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-94Improper Control of Generation of Code ('Code Injection')
T1203Exploitation for Client Execution

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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