CVE-2020-12848Public exploitNetwork attack vector

Shared-account access via exposed deterministic credentials

Published Jun 5, 2020 · Updated Aug 4, 2024

Improper authentication in Pydio Cells 2.0.4 allows remote attackers with a public share link to access a hidden shared-user account. The public-link response exposes the hidden account's random username, while client-side JavaScript derives its password by appending a fixed string to that username. A valid public link created by an authenticated sharing user is required; the recovered account can log in normally, comment on the shared file, and set a profile image.

CVSS severity5.4
Medium
EPSS probability1.10%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Improper authentication in Pydio Cells 2.0.4 allows remote attackers with a public share link to access a hidden shared-user account. The public-link response exposes the hidden account's random username, while client-side JavaScript derives its password by appending a fixed string to that username. A valid public link created by an authenticated sharing user is required; the recovered account can log in normally, comment on the shared file, and set a profile image.

The record

CVE
CVE-2020-12848
Published
Jun 5, 2020
Updated
Aug 4, 2024
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-287, T1078
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jun 5, 2020CVE 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

5.4NIST NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:N
5.8NIST NVDAV:N/AC:M/Au:N/C:P/I:P/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 exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-287Improper Authentication
T1078Valid Accounts

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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