CVE-2021-31590Public exploitNetwork attack vector

Administrative access retention via stale JWT claims

Published Jul 19, 2021 · Updated Aug 3, 2024

Incorrect access control in PwnDoc before 0.4.0 allows remote authenticated users to retain administrative access through stale JWTs. The backend validates a token cryptographically but fails to compare its embedded user, role, and permission claims with current database state. Possession of a previously issued administrative token is required; it permits administration-panel access and user or data changes after revocation.

CVSS severity8.8
High
EPSS probability2.65%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Incorrect access control in PwnDoc before 0.4.0 allows remote authenticated users to retain administrative access through stale JWTs. The backend validates a token cryptographically but fails to compare its embedded user, role, and permission claims with current database state. Possession of a previously issued administrative token is required; it permits administration-panel access and user or data changes after revocation.

The record

CVE
CVE-2021-31590
Published
Jul 19, 2021
Updated
Aug 3, 2024
Vendor
Unknown vendor
Product
Unknown product
Classifications
T1078
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Jul 19, 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 privilegesauthenticated

What is affected?

Affected products and versions are unavailable in this record.

Published CVSS scores

8.8NIST NVDCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
9.0NIST NVDAV:N/AC:L/Au:S/C:C/I:C/A:C

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

T1078Valid Accounts

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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