CVE-2021-31917Network attack vector

Unauthenticated REST access via DIGEST authentication bypass

Published Sep 21, 2021 · Updated Aug 3, 2024

Improper authentication in Infinispan 10.0.0 through 12.0.0 allows remote attackers to access protected REST endpoints. The DIGEST authentication path fails to enforce credentials across REST endpoints, so protected requests are accepted without a valid login. Exposure requires a remotely reachable REST interface configured for DIGEST; Red Hat Data Grid 8.0.0 through 8.1.1 is also affected.

CVSS severity9.8
Critical
EPSS probability1.35%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Improper authentication in Infinispan 10.0.0 through 12.0.0 allows remote attackers to access protected REST endpoints. The DIGEST authentication path fails to enforce credentials across REST endpoints, so protected requests are accepted without a valid login. Exposure requires a remotely reachable REST interface configured for DIGEST; Red Hat Data Grid 8.0.0 through 8.1.1 is also affected.

The record

CVE
CVE-2021-31917
Published
Sep 21, 2021
Updated
Aug 3, 2024
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-287, T1190
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Sep 21, 2021CVE publishedPublication date reported by the CVE source.
  2. Aug 3, 2024Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Affected buildAffected product and version details are unavailable.

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Affected products and versions are unavailable in this record.

Published CVSS scores

9.8NIST NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
7.5NIST NVDAV:N/AC:L/Au:N/C:P/I:P/A:P

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
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-287Improper Authentication
T1190Exploit Public-Facing Application

Public exploit references

No public exploit references are available in this record.

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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