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NVD / CVE Program· CNA GitHub_M

CVE-2021-32718: Improper Neutralization of Script-Related HTML Tags in a Web Page (Basic XSS) in RabbitMQ management UI

Noroxi assessment

Priority: Monitor (action score 21/100)

  • The sources we track (CISA KEV, Exploit-DB, Metasploit, Nuclei, GitHub) show no public exploit code or exploitation in the wild.
  • Probability of exploitation in the next 30 days: 1.4% (FIRST EPSS); higher than 72.9% of all records.
  • Anyone who can reach it over the internet can trigger it. A low-privileged account is enough. A user must open a link or visit a page. No special conditions are required; it is repeatable.
  • Fixed version: rabbitmq-server (Debian:12) 3.9.4-1; rabbitmq-server (openSUSE:Leap 15.2) 3.8.3-lp152.2.3.1; rabbitmq-server (openSUSE:Leap 15.3) 3.8.11-3.3.3.
  • Severity is disputed: the assigning authority (CNA) scores it 3.1, NVD 5.4.

Low priority for now. Upgrade to rabbitmq-server (Debian:12) 3.9.4-1; rabbitmq-server (openSUSE:Leap 15.2) 3.8.3-lp152.2.3.1; rabbitmq-server (openSUSE:Leap 15.3) 3.8.11-3.3.3 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

RabbitMQ is a multi-protocol messaging broker. In rabbitmq-server prior to version 3.8.17, a new user being added via management UI could lead to the user's bane being rendered in a confirmation message without proper `<script>` tag sanitization, potentially allowing for JavaScript code execution in the context of the page. In order for this to occur, the user must be signed in and have elevated permissions (other user management). The vulnerability is patched in RabbitMQ 3.8.17. As a workaround, disable `rabbitmq_management` plugin and use CLI tools for management operations and Prometheus and Grafana for metrics and monitoring.

MediumCVSS 5.4 · v3.1—No exploit Fix available
Published
Jun 28, 2021
Updated
Jun 16, 2026
EPSS
1.4% · 72th percentile

Report tools

JSON

Action score

21

Monitor

Low priority for now.

CVSS
21 / 40 · 5.4 / 10
CISA KEV
0 / 30 · Not listed
EPSS
0 / 30 · 1.4%

CNA vs NVD score

NVD
5.4
CNA · GitHub_M
3.1
2.3 point gap

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

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
  • No public exploit code on record
  • A fix has been released

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

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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
vmwarerabbitmq

Affected versions

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

  • vmware rabbitmqbefore 3.8.17

Versions reported by the vendor

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

  • rabbitmq rabbitmq-server

    • < 3.8.17affected

Package-level exposure

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

EcosystemPackageAffected rangeFix
Debian:12rabbitmq-serverbefore 3.9.4-13.9.4-1
openSUSE:Leap 15.2rabbitmq-serverbefore 3.8.3-lp152.2.3.13.8.3-lp152.2.3.1
openSUSE:Leap 15.3rabbitmq-serverbefore 3.8.11-3.3.33.8.11-3.3.3
openSUSE:Leap 15.6elixir115before 1.15.7-150300.7.5.11.15.7-150300.7.5.1
openSUSE:Leap 15.6erlang26before 26.2.1-150300.7.5.126.2.1-150300.7.5.1
openSUSE:Leap 15.6rabbitmq-server313before 3.13.1-150600.13.5.33.13.1-150600.13.5.3
Red Hat:openstack:16.1::el8rabbitmq-serverbefore 0:3.7.23-9.el8ost0:3.7.23-9.el8ost
Red Hat:openstack:16.2::el8rabbitmq-serverbefore 0:3.8.16-3.el8ost0:3.8.16-3.el8ost
SUSE:Linux Enterprise Module for Server Applications 15 SP2rabbitmq-serverbefore 3.8.3-3.3.43.8.3-3.3.4
SUSE:Linux Enterprise Module for Server Applications 15 SP3rabbitmq-serverbefore 3.8.11-3.3.33.8.11-3.3.3
SUSE:Linux Enterprise Module for Server Applications 15 SP6elixir115before 1.15.7-150300.7.5.11.15.7-150300.7.5.1
SUSE:Linux Enterprise Module for Server Applications 15 SP6erlang26before 26.2.1-150300.7.5.126.2.1-150300.7.5.1
SUSE:Linux Enterprise Module for Server Applications 15 SP6rabbitmq-server313before 3.13.1-150600.13.5.33.13.1-150600.13.5.3

Same product

vmware: all records

Other highest-scoring records for the same primary product.

  • CVE-2021-22116RabbitMQ all versions prior to 3.8.16 are prone to a denial of service vulnerability due to improper input validation in AMQP 1.0 client con
    30Monitor
  • CVE-2023-46118Denial of Service by publishing large messages over the HTTP API
    19Monitor
  • CVE-2021-32719Improper Neutralization of Script-Related HTML Tags in a Web Page (Basic XSS) in RabbitMQ federation management plugin
    19Monitor

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
debian:rabbitmq-server3.9.4-1 · Debian:12Package registry (OSV)
opensuse:elixir1151.15.7-150300.7.5.1 · openSUSE:Leap 15.6Package registry (OSV)
opensuse:erlang2626.2.1-150300.7.5.1 · openSUSE:Leap 15.6Package registry (OSV)
opensuse:rabbitmq-server3.8.3-lp152.2.3.1 · openSUSE:Leap 15.2Package registry (OSV)
opensuse:rabbitmq-server3133.13.1-150600.13.5.3 · openSUSE:Leap 15.6Package registry (OSV)
red hat:rabbitmq-server0:3.8.16-3.el8ost · Red Hat:openstack:16.2::el8Package registry (OSV)
suse:elixir1151.15.7-150300.7.5.1 · SUSE:Linux Enterprise Module for Server Applications 15 SP6Package registry (OSV)
suse:erlang2626.2.1-150300.7.5.1 · SUSE:Linux Enterprise Module for Server Applications 15 SP6Package registry (OSV)
suse:rabbitmq-server3.8.3-3.3.4 · SUSE:Linux Enterprise Module for Server Applications 15 SP2Package registry (OSV)
suse:rabbitmq-server3133.13.1-150600.13.5.3 · SUSE:Linux Enterprise Module for Server Applications 15 SP6Package registry (OSV)

Exploit status

No known public exploit

No public exploit has been observed yet. That doesn't mean you're safe, only that the bar is a little higher.

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.

No dated events beyond publication.

EPSS, last 120 days

FIRST EPSS daily score; only changes of 0.01 or more are recorded (step chart).

Patch and commit links

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

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.
  • A low-privileged account is enough.
  • A user must open a link or visit a page.
  • No special conditions are required; it is repeatable.

If successful

Confidentiality
low · data can be read
Integrity
low · data or configuration can be modified
Availability
none

Impact can extend beyond the vulnerable component (scope changes).

Attack vector
Network
Attack complexity
Low
Privileges required
Low
User interaction
Required
Scope
Changed
Confidentiality impact
Low
Integrity impact
Low
Availability impact
None

Weakness class (CWE)

CWE-80 · Improper Neutralization of Script-Related HTML Tags in a Web Page (Basic XSS)

CVSS vector

CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N

nvd-primary

Attack context

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

ATT&CK techniques

—

Change log

  1. Fix✗ → ✓

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References

Show all references (1 more)

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

All records