CVE-2026-15933Network attack vector

Administrator-only credential disclosure via cleartext page source

Published Sep 3, 2026 · Updated Sep 3, 2026

Cleartext password storage in OptimiDoc Server before 26.08 allows remote authenticated users with administrator access to read service credentials. The web administration panel embeds previously configured SMTP, FTP, Active Directory, and SharePoint passwords unmasked in returned page source. Administrative authentication is required, and successful access discloses reusable credentials for connected third-party services without altering server data.

CVSS severity6.9
Medium
EPSS probability0.36%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Cleartext password storage in OptimiDoc Server before 26.08 allows remote authenticated users with administrator access to read service credentials. The web administration panel embeds previously configured SMTP, FTP, Active Directory, and SharePoint passwords unmasked in returned page source. Administrative authentication is required, and successful access discloses reusable credentials for connected third-party services without altering server data.

The record

CVE
CVE-2026-15933
Published
Sep 3, 2026
Updated
Sep 3, 2026
Vendor
OptimiDoc
Product
OptimiDoc Server
Classifications
CWE-256, T1555
Attack vector
network
Privileges
admin

Timeline

How it unfolded

  1. Sep 3, 2026CVE publishedPublication date reported by the CVE source.
  2. Sep 3, 2026Record 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=0 <26.08

What conditions does exploitation require?

Attack vectornetwork
Required privilegesadmin

What is affected?

OptimiDoc · OptimiDoc Serverversion=0 <26.08

Published CVSS scores

6.9CERT PolskaCVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA: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.

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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 exploitUnconfirmed

Weakness, pattern, technique

CWE-256Plaintext Storage of a Password
T1555Credentials from Password Stores

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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