CVE-2025-55183

Exploitation

Public exploit code exists. CISA's assessment records a public proof of concept. That is not a report of exploitation in the wild.

SSVC decision

• ExploitationpocPublic proof-of-concept exploit code exists. Not a report of exploitation in the wild.
• AutomatableyesAn attacker can reliably automate reconnaissance through exploitation, so this scales.
• Technical ImpactpartialSuccessful exploitation gives limited control of the vulnerable component.

CISA publishes the decision points, not a final SSVC decision. The decision also depends on mission and well-being impact, which is a property of your deployment rather than of the vulnerability.

EPSS probability

64.23% probability of exploitation activity in the next 30 days.

EPSS percentile

Equal to or higher than the score of 99.1% of scored records. A rank, not a probability.

NVD base score

5.3 (CVSS v3.x), scored by the NVD independently of the CNA.

NVD CVSS vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N

NVD analysis status

Analyzed. NVD last modified this record on 2026-10-07.

Red Hat severity

Moderate. Red Hat's rating for its own products, not a CVSS rating.

Exploit-prediction scores from FIRST. Independent scoring and analysis status from the NVD. Vendor severity from Red Hat. Exploitation assessment and catalog membership from CISA.

Published

2025-12-11 20:04Z10 MO AGO

Last updated

2026-01-07 16:26Z9 MO AGO

Reserved

2025-08-08

Assigning CNA

Meta

Record state

PUBLISHED

Severity

Medium (CVSS 5.3)

CNA CVSS vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N

Weaknesses

• CWE-497Exposure of Sensitive System Information to an Unauthorized Control SphereBase

Data version

5.2

Document digest

78c27e799ddb7ea5ac5be4e217b350910a6af84d15bf02425d143e43931faa24

• www.facebook.comhttps://www.facebook.com/security/advisories/cve-2025-55183x_refsource_CONFIRM
• react.devhttps://react.dev/blog/2025/12/11/denial-of-service-and-source-code-exposure-in-react-server-componentsx_refsource_CONFIRM