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01 Record

CVE-2021-32623

Opencast vulnerable to billion laughs attack (XML bomb)

HighPUBLISHEDCNA: GitHub_M
CNA base score8.1 CVSS v3.xCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:H

02 Description

Opencast vulnerable to billion laughs attack (XML bomb)

03 Exploitation and scoring

Exploitation
Not assessed. CISA has not published an exploitation assessment for this record, and it is not in the KEV catalog. That is an absence of assessment, not a finding of no risk.
SSVC decision
Not assessed by CISA
EPSS probability
1.25% probability of exploitation activity in the next 30 days.
EPSS percentile
Equal to or higher than the score of 69.0% of scored records. A rank, not a probability.
NVD base score
6.5 (CVSS v3.x), scored by the NVD independently of the CNA.
NVD CVSS vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
NVD analysis status
Modified. NVD last modified this record on 2026-06-17.
Red Hat severity
No Red Hat rating. Red Hat rates the CVEs that affect its products.

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.

04 Metadata

Published
2021-06-15 23:45Z5 YR AGO
Last updated
2024-08-03 23:25Z2 YR AGO
Reserved
2021-05-12
Assigning CNA
GitHub_M
Record state
PUBLISHED
Severity
High (CVSS 8.1)
CNA CVSS vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:H
Weaknesses
  • CWE-776Improper Restriction of Recursive Entity References in DTDs ('XML Entity Expansion')Base
Data version
5.1
Document digest
cce354e034a0ea504e7e0e926285da38ba3b251747fc42bc3385f3066a50df86

05 Affected products

VendorProductVersionsPlatforms
opencastopencast< 9.6—

06 References