CVE-2021-45887Public exploitNetwork attack vector

Authenticated code execution via traversal ZIP upload

Published Mar 13, 2022 · Updated Aug 4, 2024

Path traversal in PONTON X/P Messenger before 3.11.2 allows remote authenticated users to execute code through a crafted ZIP upload. The Schema Set Upload handler extracts untrusted ZIP entries under config/Schemata without confining traversal paths, allowing a JSP file to land in webroot/imgs. Configuration Administrator or Administrator access to the normally internal web UI is required; requesting the uploaded JSP executes commands on the server.

CVSS severity9.8
Critical
EPSS probability3.47%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Path traversal in PONTON X/P Messenger before 3.11.2 allows remote authenticated users to execute code through a crafted ZIP upload. The Schema Set Upload handler extracts untrusted ZIP entries under config/Schemata without confining traversal paths, allowing a JSP file to land in webroot/imgs. Configuration Administrator or Administrator access to the normally internal web UI is required; requesting the uploaded JSP executes commands on the server.

The record

CVE
CVE-2021-45887
Published
Mar 13, 2022
Updated
Aug 4, 2024
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-22, CWE-434, T1505.003
Attack vector
network
Privileges
admin

Timeline

How it unfolded

  1. Mar 13, 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 privilegesadmin

What is affected?

Affected products and versions are unavailable in this record.

Published CVSS scores

7.5NIST NVDAV:N/AC:L/Au:N/C:P/I:P/A:P
9.8NIST NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:N/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
Privilegesadmin
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-22Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')
CWE-434Unrestricted Upload of File with Dangerous Type
T1505.003Server Software Component: Web Shell

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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