CVE-2026-15933
Cleartext Storage of Sensitive Credentials in OptimiDoc Server (On-Premise)
Description
OptimiDoc Server (On-Premise) stores credentials for external services in cleartext. An authenticated administrator can view previously configured service passwords, including SMTP, FTP (for scan delivery), Active Directory (for user list import), and SharePoint credentials, in cleartext via the web administration panel page source, allowing exposure of sensitive third-party authentication data. This issue was fixed in version 26.08
INFO
Published Date :
Sept. 3, 2026, 1:04 p.m.
Last Modified :
Sept. 8, 2026, 2:04 p.m.
Remotely Exploit :
Yes !
Source :
[email protected]
CVSS Scores
| Score | Version | Severity | Vector | Exploitability Score | Impact Score | Source |
|---|---|---|---|---|---|---|
| CVSS | 134c704f-9b21-4f2e-91b3-4a467353bcc0 | |||||
| CVSS 4.0 | MEDIUM | 4bb8329e-dd38-46c1-aafb-9bf32bcb93c6 | ||||
| CVSS 4.0 | MEDIUM | [email protected] |
Solution
- Update OptimiDoc Server to version 26.08.
- Review all stored external service credentials.
- Change compromised credentials immediately.
References to Advisories, Solutions, and Tools
Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2026-15933.
| URL | Resource |
|---|---|
| https://cert.pl/en/posts/2026/09/CVE-2026-15933 | |
| https://optimidoc.com/category/optimidoc-server/ |
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2026-15933 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2026-15933
weaknesses.
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2026-15933 vulnerability anywhere in the article.
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cert.pl
Vulnerability in OptimiDoc Server (On-Premise) software
Vulnerability in OptimiDoc Server (On-Premise) software CVE ID CVE-2026-15933 Publication date 03 September 2026 Vendor OptimiDoc Product OptimiDoc Server Vulnerable versions All before 26.08 Vulnerab ... Read more
The following table lists the changes that have been made to the
CVE-2026-15933 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
-
CVE Modified by 134c704f-9b21-4f2e-91b3-4a467353bcc0
Sep. 03, 2026
Action Type Old Value New Value Added SSVC {'id': 'CVE-2026-15933', 'role': 'CISA Coordinator', 'options': [{'exploitation': 'none'}, {'automatable': 'no'}, {'technicalImpact': 'partial'}], 'version': '2.0.3', 'timestamp': '2026-09-03T12:59:09.612619Z'} -
New CVE Received by [email protected]
Sep. 03, 2026
Action Type Old Value New Value Added Description OptimiDoc Server (On-Premise) stores credentials for external services in cleartext. An authenticated administrator can view previously configured service passwords, including SMTP, FTP (for scan delivery), Active Directory (for user list import), and SharePoint credentials, in cleartext via the web administration panel page source, allowing exposure of sensitive third-party authentication data. This issue was fixed in version 26.08 Added CVSS V4.0 AV:N/AC:L/AT:N/PR:H/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X Added CWE CWE-256 Added Affected New affected value received. <a href="https://github.com/CVEProject/cvelistV5/blob/main/cves/2026/15xxx/CVE-2026-15933.json">CVE-2026-15933</a> Added Reference https://cert.pl/en/posts/2026/09/CVE-2026-15933 Added Reference https://optimidoc.com/category/optimidoc-server/