CVE-2017-12973

What it is

Nimbus JOSE+JWT before 4.39 proceeds improperly after detection of an invalid HMAC in authenticated AES-CBC decryption, which allows attackers to conduct a padding oracle attack.

At a glance

Exploitability

Can be exploited over the network without logging in, but needs a user to act. Limited direct impact.

Exploit odds

0.6% chance of exploitation in the next 30 days (EPSS).

Fix

A patch, advisory or fixed version is referenced. Upgrade or apply it.

Timeline

1. 2017-08-20 16:29 UTC PublishedDisclosed publicly on CVE.org and NVD
2. 2026-06-17 01:04 UTC Last updatedMost recent change to the record

Why it ranks here

• Exploited in the wild: no, CISA does not list it.
• Exploit odds: 0.6% in the next 30 days (EPSS).
• Severity: 3.1 LOW (CVSS).
• Fix: a patch or advisory is linked.

Details

Published

2017-08-20 16:29 UTC

Last modified

2026-06-17 01:04 UTC

Exploit probability

0.6% · EPSS, next 30 days

Weakness

CWE-354

Record status

Modified

Affected

• connect2id Nimbus jose\+jwt 1.0
• connect2id Nimbus jose\+jwt 1.1
• connect2id Nimbus jose\+jwt 1.2
• connect2id Nimbus jose\+jwt 1.3
• connect2id Nimbus jose\+jwt 1.4
• connect2id Nimbus jose\+jwt 1.5
• connect2id Nimbus jose\+jwt 1.6
• connect2id Nimbus jose\+jwt 1.7

Attack profile CVSS 3.0 · 3.1

Attack vector

Network

Complexity

High

Privileges needed

None

User interaction

Required

Scope

Unchanged

Confidentiality

Low

Integrity

None

Availability

None

Is it in your code?

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