CVE-2021-45968Known exploitationPublic exploitNetwork attack vector

Internal resource disclosure via unchecked favicon host

Published Mar 18, 2022 · Updated Aug 4, 2024

SSRF in the XMPP Server component of Pascom Cloud Phone System before 7.20.x allows remote attackers to read internal HTTP resources. FaviconServlet builds an HTTP URL from the host parameter without validation, allowing arbitrary HTTP GET requests through the backend server. The unauthenticated web path can reach the servlet through Nginx-Tomcat URI parsing differences, exposing localhost-only data.

CVSS severity7.5
High
EPSS probability10.38%
Next 30 days · Sep 16, 2026
Known exploitationReported
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

SSRF in the XMPP Server component of Pascom Cloud Phone System before 7.20.x allows remote attackers to read internal HTTP resources. FaviconServlet builds an HTTP URL from the host parameter without validation, allowing arbitrary HTTP GET requests through the backend server. The unauthenticated web path can reach the servlet through Nginx-Tomcat URI parsing differences, exposing localhost-only data.

The record

CVE
CVE-2021-45968
Published
Mar 18, 2022
Updated
Aug 4, 2024
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-918, T1190
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Mar 18, 2022CVE publishedPublication date reported by the CVE source.
  2. Aug 4, 2024Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Affected buildAffected product and version details are unavailable.

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Affected products and versions are unavailable in this record.

Published CVSS scores

7.5NIST NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
5.0NIST NVDAV:N/AC:L/Au:N/C:P/I:N/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
Privilegesunauthenticated
Known exploitationReported
Public exploitPublished

Weakness, pattern, technique

CWE-918Server-Side Request Forgery (SSRF)
T1190Exploit Public-Facing Application

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Reported exploitation

Technologies

Your stack

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Your stack

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