TI-2025-34878 Aliases CVE-2025-55202 GHSA-hq8m-v68g-8cf8

Opencast has a partial path traversal vulnerability in UI config

LOW 14CWE-23Published 2025-08-29 · Updated 2025-08-29

Key facts

Attack vector: Network
Privileges required: None
User interaction: None
Attack complexity: Low
Attack requirements: None
Impact type: Information disclosure
Confidentiality · integrity · availability: Low · None · None
Fix status: Fixed

Attack profile from CVSS 4.0 · CNA. Fix status from CNA and GitHub. Impact type from CWE-23 and the CVSS impact.

Summary

Opencast is a free, open-source platform to support the management of educational audio and video content. In version 18.0 and versions before 17.7, the protections against path traversal attacks in the UI config module are insufficient, still partially allowing for attacks in very specific cases. The path is checked without checking for the file separator. This could allow attackers access to files within another folder which starts with the same path. This issue has been fixed in versions 17.7 and 18.1. To mitigate this issue, check for folders that start with the same path as the ui-config folder.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV

EPSS 0.00401 34th percentileScored 2026-11-07

Fix Fixed opencast (opencast): 17.7org.opencastproject:opencast-user-interface-configuration (Maven): 17.7, 18.1

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation: None
Automatable: No
Technical impact: Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

Vendor	Product	Affected versions	Fixed in	Status	Source
opencast	opencast	before 17.7; = 18.0	17.7	Patch available	CNA
—	org.opencastproject:opencast-user-interface-configuration (Maven)	before 17.7	17.7	Patch available	GHSA-hq8m-v68g-8cf8
—	org.opencastproject:opencast-user-interface-configuration (Maven)	18.0 to before 18.1	18.1	Patch available	GHSA-hq8m-v68g-8cf8

opencast Vendoropencast Affected before 17.7; = 18.0 Fixed in 17.7 Patch available CNA
org.opencastproject:opencast-user-interface-configuration (Maven) Vendor— Affected before 17.7 Fixed in 17.7 Patch available GHSA-hq8m-v68g-8cf8
org.opencastproject:opencast-user-interface-configuration (Maven) Vendor— Affected 18.0 to before 18.1 Fixed in 18.1 Patch available GHSA-hq8m-v68g-8cf8

CPE configurations NVD · 2

CPE	Versions	Role	Vendor
cpe:2.3:a:apereo:opencast::::::::	before 17.7	Vulnerable	Apereo
cpe:2.3:a:apereo:opencast:18.0:::::::*	18.0	Vulnerable	Apereo

cpe:2.3:a:apereo:opencast:*:*:*:*:*:*:*:* Versions before 17.7 Vulnerable ·Apereo
cpe:2.3:a:apereo:opencast:18.0:*:*:*:*:*:*:* Versions 18.0 Vulnerable ·Apereo

Remediation

Fix · CNA opencast (opencast) Fixed in 17.7
Fix · GHSA-hq8m-v68g-8cf8 org.opencastproject:opencast-user-interface-configuration (Maven) Fixed in 17.7 Advisory →
Fix · GHSA-hq8m-v68g-8cf8 org.opencastproject:opencast-user-interface-configuration (Maven) Fixed in 18.1 Advisory →

Timeline

2026-10-02 Threatist record created from CVE-2025-55202
2026-10-03 Alias added: GHSA-hq8m-v68g-8cf8

References

Patch 2

Advisory 2

Other 1

https://github.com/opencast/opencast

TI-2026-54099 Paella Player: Stored XSS via caption cue text CVSS 3.1HIGH 8.7
TI-2026-54098 Opencast: Session fixation in login enables account takeover via crafted link CVSS 3.1HIGH 8.8
TI-2021-19627 Files Accessible to External Parties in Opencast CVSS 3.1CRITICAL 9.9
TI-2025-38256 Opencast's editor accidentally publishes videos/overwrites publications #1626 CVSS 4.0LOW 2.3
TI-2020-04262 Authentication Bypass For Endpoints With Anonymous Access in OpenCast CVSS 3.1CRITICAL 10.0
TI-2017-14534 Opencast 2.3.2 and older versions are vulnerable to script injections through media and… CVSS 3.0HIGH 8.8

See all 20 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences