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NVD / CVE Program· CNA oracle

CVE-2021-2471: Vulnerability in the MySQL Connectors product of Oracle MySQL (component: Connector/J).

Noroxi assessment

Priority: Monitor (action score 25/100)

  • Public proof-of-concept code exists (GitHub); there is no record of exploitation in the wild.
  • Probability of exploitation in the next 30 days: 7.4% (FIRST EPSS); higher than 94.4% of all records.
  • Anyone who can reach it over the internet can trigger it. Administrator privileges are required. No user action is required. Special conditions such as timing or configuration are required.
  • Fixed version: mysql:mysql-connector-java (Maven) 8.0.27; mysql-connector-java (openSUSE:Leap 15.3) 5.1.47-3.6.1; mysql-connector-java (openSUSE:Tumbleweed) 8.0.28-1.1.

Low priority for now. Upgrade to mysql:mysql-connector-java (Maven) 8.0.27; mysql-connector-java (openSUSE:Leap 15.3) 5.1.47-3.6.1; mysql-connector-java (openSUSE:Tumbleweed) 8.0.28-1.1 or later.

Generated automatically from the record's data: CVSS (NVD and CNA), CISA KEV and SSVC, FIRST EPSS, exploit sources, fixed versions. How we calculate it

Primary sources: NVD · CVE.org · FIRST EPSS

Vulnerability in the MySQL Connectors product of Oracle MySQL (component: Connector/J). Supported versions that are affected are 8.0.26 and prior. Difficult to exploit vulnerability allows high privileged attacker with network access via multiple protocols to compromise MySQL Connectors. Successful attacks of this vulnerability can result in unauthorized access to critical data or complete access to all MySQL Connectors accessible data and unauthorized ability to cause a hang or frequently repeatable crash (complete DOS) of MySQL Connectors. CVSS 3.1 Base Score 5.9 (Confidentiality and Availability impacts). CVSS Vector: (CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:U/C:H/I:N/A:H).

MediumCVSS 5.9 · v3.1—Proof of concept Fix available
Published
Oct 20, 2021
Updated
Jun 16, 2026
EPSS
7.4% · 94th percentile
CWE
—

Report tools

JSON

Action score

25

Monitor

Low priority for now.

CVSS
23 / 40 · 5.9 / 10
CISA KEV
0 / 30 · Not listed
EPSS
2 / 30 · 7.4%

CISA SSVC decision

Exploitation
none
Automatable
no
Technical impact
partial

Vulnrichment: CISA's decision-tree inputs.

CNA vs NVD score

NVD
—
CNA · oracle
5.9
NVD has not scored this yet; the score shown is the CNA’s.

The score given by the assigning authority versus NVD’s independent score. A gap means the severity is contested.

Get told when this record changes

  • Not in KEV: no record of exploitation in the wild
  • Proof of concept exists, no weaponized module
  • A fix has been released

If any of these changes, we'll tell you in the daily email digest.

Follow CVE-2021-2471

When you'll hear from us

  • when it enters CISA KEV
  • when exploit code appears or is weaponized
  • when the record is updated (including a fixed version)
  • when EPSS rises 20 points in a week

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Noroxi analysis

What does it mean in your environment?

The assessment above is generated automatically from the record's data; it doesn't know your environment. Our team verifies on your systems whether this vulnerability is actually exploitable and which mitigation is enough.

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Affected systems

Is your version affected?

Pick the product and type the version you run. It's compared with this record's version ranges in your browser; the version isn't sent anywhere.

VendorProduct
oraclecommunications cloud native core console
oraclecommunications cloud native core network slice selection function
oraclecommunications cloud native core policy
oraclecommunications cloud native core security edge protection proxy
oraclemysql connectors
quarkusquarkus

Affected versions

NVD version ranges (for catalog products). Add the product to your stack with a version and matching uses these.

  • oracle communications cloud native core console1.9.0
  • oracle communications cloud native core network slice selection function1.8.0
  • oracle communications cloud native core policy1.15.0
  • oracle communications cloud native core security edge protection proxy1.7.0
  • oracle mysql connectors8.0.0 and later · up to 8.0.26 inclusive
  • quarkus quarkusbefore 2.2.4
  • quarkus quarkus2.3.0 and later · before 2.6.0

Versions reported by the vendor

Affected version ranges reported by the assigning authority (oracle). Independent of NVD's CPE analysis and usually ahead of it.

  • Oracle Corporation MySQL Connectors

    • 8.0.26 and prioraffected

Package-level exposure

OSV and GitHub Advisory data: ecosystem, package and range. SBOM matching uses this table.

EcosystemPackageAffected rangeFix
Mavenmysql:mysql-connector-javafrom 8.0.0 · before 8.0.278.0.27
openSUSE:Leap 15.3mysql-connector-javabefore 5.1.47-3.6.15.1.47-3.6.1
openSUSE:Tumbleweedmysql-connector-javabefore 8.0.28-1.18.0.28-1.1
SUSE:HPE Helion OpenStack 8mysql-connector-javabefore 8.0.25-5.13.18.0.25-5.13.1

Remediation

Which version to upgrade to

Fix versions compiled from the vendor, package registries and Microsoft. Verify the vendor's note before upgrading.

Product / packageFixed versionSource
Maven:mysql:mysql-connector-java8.0.27Package registry (OSV)
opensuse:mysql-connector-java5.1.47-3.6.1 · openSUSE:Leap 15.3Package registry (OSV)
suse:mysql-connector-java8.0.25-5.13.1 · SUSE:HPE Helion OpenStack 8Package registry (OSV)

Exploit status

Proof of concept available

A public proof of concept or detection signature exists. Exploit knowledge is out there; don't delay patching.

Evidence

  • Proof-of-concept repository on GitHub ×3

Noroxi does not host or link to exploit code. Metasploit module names and Nuclei template ids are shown (names, not code); Exploit-DB entries and PoC repositories are given as counts only.

Public exploit evidence
SourceKindDate
Proof-of-concept repository on GitHubstars:542021-10-22
Proof-of-concept repository on GitHubstars:32021-10-22
Proof-of-concept repository on GitHubstars:32021-10-22

Research context

For pentesters and researchers: attack profile, score disagreement, timeline, patch commits, credits, variant and chain candidates, bug bounty scope. All derived from existing data; no exploit code.

Timeline

From publication to today: proof of concept, Metasploit module, CISA KEV and fix record. Dates are as reported by the sources.

  1. Published
  2. First PoC+2 d
  3. TodayOct 30, 2026+1836 d

No history yet (it accumulates with the daily EPSS job).

Patch and commit links

Commit, PR and diff links among the references. A starting point for patch-diffing and variant hunting; fixes, not exploits.

No commit or PR link among the references.

Credits

All researchers

Finders, reporters and analysts named in the CNA record. Click a name for that researcher’s other records.

No credits in the CNA record.

Variant candidates

Same product, same weakness class, within 18 months. If the patch missed the root cause, the sibling bug is here.

No nightly-computed relations.

Chain candidates

An authentication bypass and a privilege-requiring bug in the same product, published close together: combined they may become an unauthenticated path.

—

Bug bounty scope

No known public program.

Source: bounty-targets-data (public HackerOne, Bugcrowd, Intigriti, YesWeHack listings).

Technical details

Attack conditions

  • Anyone who can reach it over the internet can trigger it.
  • Administrator privileges are required.
  • No user action is required.
  • Special conditions such as timing or configuration are required.

If successful

Confidentiality
high · data can be read
Integrity
none
Availability
high · the service can be disrupted
Attack vector
Network
Attack complexity
High
Privileges required
High
User interaction
None
Scope
Unchanged
Confidentiality impact
High
Integrity impact
None
Availability impact
High

Weakness class (CWE)

—

CVSS vector

CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:U/C:H/I:N/A:H

nvd-secondary

Attack context

MITRE CAPEC attack patterns and ATT&CK techniques for this weakness class (CWE). A starting point for detection rules and threat hunting.

MITRE has no CAPEC/ATT&CK mapping for this CWE.

Change log

  1. Fix✗ → ✓

For records you follow, these changes also arrive as notifications. →

References

Show all references (1 more)

Vendor advisories and official records. Exploit/PoC links are deliberately left out.

All records