CVE-2025-15251Public exploitNetwork attack vector

Server file disclosure via unrestricted external entities

Published Dec 30, 2025 · Updated Dec 30, 2025

XXE in FastBee 2.0 through 2.1 SIP message handling allows remote attackers to read server files via crafted XML messages. ReqAbstractHandler.getRootElement passes the message body to dom4j SAXReader without disabling DOCTYPE declarations or external entities, so an attacker-controlled DTD resolves local files and exfiltrates their contents. Exploitation requires a valid deviceSipId and network access to the enabled SIP service, whose documented default port is 5061.

CVSS severity6.3
Medium
EPSS probability0.33%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

XXE in FastBee 2.0 through 2.1 SIP message handling allows remote attackers to read server files via crafted XML messages. ReqAbstractHandler.getRootElement passes the message body to dom4j SAXReader without disabling DOCTYPE declarations or external entities, so an attacker-controlled DTD resolves local files and exfiltrates their contents. Exploitation requires a valid deviceSipId and network access to the enabled SIP service, whose documented default port is 5061.

The record

CVE
CVE-2025-15251
Published
Dec 30, 2025
Updated
Dec 30, 2025
Vendor
Qujing Fengxin Technology Co., Ltd.
Product
FastBee
Classifications
CWE-611, CWE-610, T1190, T1005
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Dec 30, 2025CVE publishedPublication date reported by the CVE source.
  2. Dec 30, 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=2.0
  2. Affected versionversion=2.1

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Qujing Fengxin Technology Co., Ltd. · FastBeeversion=2.0; version=2.1

Published CVSS scores

5.1VulDBAV:N/AC:H/Au:N/C:P/I:P/A:P/E:ND/RL:ND/RC:UR
6.3VulDBCVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:X
5.6VulDBCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:L/E:X/RL:X/RC:R
5.6VulDBCVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:L/E:X/RL:X/RC:R

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
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-611Improper Restriction of XML External Entity Reference
CWE-610Externally Controlled Reference to a Resource in Another Sphere
T1190Exploit Public-Facing Application
T1005Data from Local System

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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