CVE-2025-61906Public exploitNetwork attack vector

Internal media exposure via retained publish workflow

Published Oct 8, 2025 · Updated Oct 8, 2025

Information exposure in Opencast before 17.8 and 18.0 through 18.1 allows remote authenticated users to publish internal media. The editor's SaveButton kept selectedWorkflowId in later save-only requests, so returning from Save & Process Changes and choosing Save Changes launched the retained publish workflow. Exploitation requires event write access, editor use, and that exact sequence; the resulting publication can expose media intended to remain internal.

CVSS severity2.3
Low
EPSS probability0.29%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Information exposure in Opencast before 17.8 and 18.0 through 18.1 allows remote authenticated users to publish internal media. The editor's SaveButton kept selectedWorkflowId in later save-only requests, so returning from Save & Process Changes and choosing Save Changes launched the retained publish workflow. Exploitation requires event write access, editor use, and that exact sequence; the resulting publication can expose media intended to remain internal.

The record

CVE
CVE-2025-61906
Published
Oct 8, 2025
Updated
Oct 8, 2025
Vendor
Opencast
Product
Opencast
Classifications
CWE-200
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Oct 8, 2025CVE publishedPublication date reported by the CVE source.
  2. Oct 8, 2025Record 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=< 17.8
  2. Affected versionversion=>= 18.0, < 18.2

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Opencast · Opencastversion=< 17.8; version=>= 18.0, < 18.2

Published CVSS scores

4.3NIST NVDCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N
2.3GitHub, Inc.CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:L/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
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-200Exposure of Sensitive Information to an Unauthorized Actor

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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