CVE-2023-2978Public exploitNetwork attack vector

Authenticated subscription modification via user-controlled key

Published May 30, 2023 · Updated Aug 2, 2024

Authorization bypass in Pydio Cells 4.2.0 allows remote authenticated users to alter subscription-related data via the web API. The Change Subscription Handler resolves a user-controlled record key without enforcing authorization for the referenced record; published sources do not disclose the affected request or function. A valid low-privilege account is required, and the documented consequence is limited to unauthorized data modification.

CVSS severity4.3
Medium
EPSS probability0.73%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
Coverage for this vulnerability

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Summary

What happened

Authorization bypass in Pydio Cells 4.2.0 allows remote authenticated users to alter subscription-related data via the web API. The Change Subscription Handler resolves a user-controlled record key without enforcing authorization for the referenced record; published sources do not disclose the affected request or function. A valid low-privilege account is required, and the documented consequence is limited to unauthorized data modification.

The record

CVE
CVE-2023-2978
Published
May 30, 2023
Updated
Aug 2, 2024
Vendor
Pydio
Product
Pydio Cells
Classifications
CWE-639
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. May 30, 2023CVE publishedPublication date reported by the CVE source.
  2. Aug 2, 2024Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

Compare your product and version with the public record. A matching version still requires validation against your environment.

Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=4.2.0

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Pydio · Pydio Cellsversion=4.2.0

Published CVSS scores

4.6VulDB CNACVSS:3.1/AV:A/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:L
4.1VulDB CNAAV:A/AC:L/Au:S/C:N/I:P/A:P
4.3NVDCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N
4.3GitHubCVSS:3.1/AV:N/AC:L/PR:L/UI:N/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-639Authorization Bypass Through User-Controlled Key

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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