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CVE-2017-12973

12
FAUCET Score

CVE-2017-12973 describes a padding oracle vulnerability in Nimbus JOSE+JWT versions prior to 4.39. This flaw allows attackers to conduct a padding oracle attack during authenticated AES-CBC decryption due to improper error handling after detecting an invalid HMAC. The vulnerability has a low CVSS score of 3.1, indicating a low impact on confidentiality and no impact on integrity or availability, requiring user interaction and high attack complexity. There is no evidence of active exploitation, public exploit code (Metasploit, Nuclei, ExploitDB), or significant community discussion or media coverage surrounding this CVE.

Impacted Technologies

VendorProductVersion(s)CPE
1.0CPE matchmatch criteria
cpe:2.3:a:connect2id:nimbus_jose\+jwt:1.0:*:*:*:*:*:*:*
1.1CPE matchmatch criteria
cpe:2.3:a:connect2id:nimbus_jose\+jwt:1.1:*:*:*:*:*:*:*
1.2CPE matchmatch criteria
cpe:2.3:a:connect2id:nimbus_jose\+jwt:1.2:*:*:*:*:*:*:*
1.3CPE matchmatch criteria
cpe:2.3:a:connect2id:nimbus_jose\+jwt:1.3:*:*:*:*:*:*:*
1.4CPE matchmatch criteria
cpe:2.3:a:connect2id:nimbus_jose\+jwt:1.4:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.0

3.1LOW

CVSS:3.0/AV:N/AC:H/PR:N/UI:R/S:U/C:L/I:N/A:N

Attack Vector
NETWORK
Attack Complexity
HIGH
Privileges Required
NONE
User Interaction
REQUIRED
Scope
UNCHANGED
Confidentiality Impact
LOW
Integrity Impact
NONE
Availability Impact
NONE
Exploitability Score
1.6
Impact Score
1.4
CvssVersion
3.0

Exploit Intelligence

EPSS Score
0.64%
Probability of exploitation in next 30 days
EPSS Percentile
46.8%
Percentile rank of EPSS score among Peer Group
As of 2026-07-24
Model: v2026.06.15
This CVE's current EPSS score of 0.0064 is in the 72nd percentile among its peer group of 231 CVEs.

Social Chatter

No social media mentions found for this CVE.

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.2 Bluesky, 0.0 Mastodon, and 0.1 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.1 InfoSec Media, 0.1 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (1)

mavenpatch availablevia ghsa
Product: com.nimbusds:nimbus-jose-jwtFixed in: 4.39

Vendor Advisories (1)

mavenGHSA-jfmq-4g4m-99rhlow

Nimbus JOSE+JWT vulnerable to padding oracle attack

May 13, 2022

References

bitbucket.org / connect2id/nimbus-jose-jwt/commits/6a29f10f723f406eb25555f55842c59a43a38912
PatchThird Party Advisory
bitbucket.org / connect2id/nimbus-jose-jwt/issues/223/aescbc-return-immediately-on-invalid-hmac
Third Party Advisory
bitbucket.org / connect2id/nimbus-jose-jwt/src/master/CHANGELOG.txt
Release NotesThird Party Advisory