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NVD / CVE Program· CNA GitHub_M

CVE-2021-29622: Arbitrary redirects under /new endpoint

Noroxi assessment

Priority: Monitor (action score 30/100)

  • A ready-made attack module is public (Nuclei); exploiting it takes no special expertise.
  • Public proof-of-concept code exists (Exploit-DB / GitHub); there is no record of exploitation in the wild.
  • Probability of exploitation in the next 30 days: 19.5% (FIRST EPSS); higher than 97.3% of all records.
  • Anyone who can reach it over the internet can trigger it. No account or password is required. A user must open a link or visit a page. No special conditions are required; it is repeatable.
  • Fixed version: ansible (openSUSE:Leap 15.2) 2.9.21-lp152.2.7.1; dracut-saltboot (openSUSE:Leap 15.2) 0.1.1627546504.96a0b3e-lp152.2.26.1; golang-github-prometheus-prometheus (openSUSE:Leap 15.2) 2.27.1-lp152.3.13.1.

Low priority for now. Upgrade to ansible (openSUSE:Leap 15.2) 2.9.21-lp152.2.7.1; dracut-saltboot (openSUSE:Leap 15.2) 0.1.1627546504.96a0b3e-lp152.2.26.1; golang-github-prometheus-prometheus (openSUSE:Leap 15.2) 2.27.1-lp152.3.13.1 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

Prometheus is an open-source monitoring system and time series database. In 2.23.0, Prometheus changed its default UI to the New ui. To ensure a seamless transition, the URL's prefixed by /new redirect to /. Due to a bug in the code, it is possible for an attacker to craft an URL that can redirect to any other URL, in the /new endpoint. If a user visits a prometheus server with a specially crafted address, they can be redirected to an arbitrary URL. The issue was patched in the 2.26.1 and 2.27.1 releases. In 2.28.0, the /new endpoint will be removed completely. The workaround is to disable access to /new via a reverse proxy in front of Prometheus.

MediumCVSS 6.1 · v3.1—Proof of concept Fix available
Published
May 19, 2021
Updated
Jun 16, 2026
EPSS
19.5% · 97th percentile

Report tools

JSON

Action score

30

Monitor

Low priority for now.

CVSS
24 / 40 · 6.1 / 10
CISA KEV
0 / 30 · Not listed
EPSS
6 / 30 · 19.5%

CNA vs NVD score

NVD
6.1
CNA · GitHub_M
6.5
0.4 point gap

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:H/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
  • 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-2021-29622

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
prometheusprometheus

Affected versions

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

  • prometheus prometheus2.23.0 and later · before 2.26.1
  • prometheus prometheus2.27.0

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.

  • prometheus prometheus

    • >= 2.23.0, < 2.27.1affected

Package-level exposure

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

EcosystemPackageAffected rangeFix
openSUSE:Leap 15.2ansiblebefore 2.9.21-lp152.2.7.12.9.21-lp152.2.7.1
openSUSE:Leap 15.2dracut-saltbootbefore 0.1.1627546504.96a0b3e-lp152.2.26.10.1.1627546504.96a0b3e-lp152.2.26.1
openSUSE:Leap 15.2golang-github-prometheus-prometheusbefore 2.27.1-lp152.3.13.12.27.1-lp152.3.13.1
openSUSE:Leap 15.3ansiblebefore 2.9.21-1.5.12.9.21-1.5.1
openSUSE:Leap 15.3dracut-saltbootbefore 0.1.1627546504.96a0b3e-1.27.10.1.1627546504.96a0b3e-1.27.1
openSUSE:Leap 15.3golang-github-prometheus-prometheusbefore 2.27.1-3.8.12.27.1-3.8.1
openSUSE:Leap 15.3mgr-cfgbefore 4.2.3-1.18.14.2.3-1.18.1
openSUSE:Leap 15.3mgr-custom-infobefore 4.2.2-1.12.14.2.2-1.12.1
openSUSE:Leap 15.3mgr-osadbefore 4.2.6-1.30.14.2.6-1.30.1
openSUSE:Leap 15.3mgr-pushbefore 4.2.3-1.12.14.2.3-1.12.1
openSUSE:Leap 15.3mgr-virtualizationbefore 4.2.2-1.20.14.2.2-1.20.1
openSUSE:Leap 15.3rhnlibbefore 4.2.4-3.28.14.2.4-3.28.1
openSUSE:Leap 15.3spacecmdbefore 4.2.11-3.62.14.2.11-3.62.1
openSUSE:Leap 15.3spacewalk-client-toolsbefore 4.2.12-3.44.14.2.12-3.44.1
openSUSE:Leap 15.3spacewalk-koanbefore 4.2.4-3.21.14.2.4-3.21.1
openSUSE:Leap 15.3spacewalk-oscapbefore 4.2.2-3.12.14.2.2-3.12.1
openSUSE:Leap 15.3suseRegisterInfobefore 4.2.4-3.15.14.2.4-3.15.1
openSUSE:Leap 15.3uyuni-common-libsbefore 4.2.5-1.15.14.2.5-1.15.1
openSUSE:Tumbleweedgolang-github-prometheus-prometheusbefore 2.27.1-4.22.27.1-4.2
SUSE:Enterprise Storage 6golang-github-prometheus-prometheusbefore 2.27.1-3.8.12.27.1-3.8.1
SUSE:Manager Client Tools 12golang-github-prometheus-prometheusbefore 2.27.1-1.29.22.27.1-1.29.2
SUSE:Manager Client Tools 12grafanabefore 7.5.7-1.21.27.5.7-1.21.2
SUSE:Manager Client Tools 12mgr-cfgbefore 4.2.3-1.18.24.2.3-1.18.2
SUSE:Manager Client Tools 12mgr-custom-infobefore 4.2.2-1.12.24.2.2-1.12.2

+25

Same product

prometheus: all records

Other highest-scoring records for the same primary product.

  • CVE-2026-42154Prometheus: remote read endpoint allows denial of service via crafted snappy payload
    30Monitor
  • CVE-2026-42151Prometheus Azure AD remote write OAuth client secret exposed via config API
    30Monitor
  • CVE-2019-3826A stored, DOM based, cross-site scripting (XSS) flaw was found in Prometheus before version 2.7.1.
    25Monitor

Published before and after this one in the same product

  • Later →CVE-2026-40179Apr 15, 2026 · Prometheus: Stored XSS via metric names and label values in web UI tooltips and metrics explorer
    21Monitor
  • Later →CVE-2026-44903May 26, 2026 · Prometheus: Stored XSS via crafted histogram bucket label values in the heatmap display of the old Prometheus web UI
    20Monitor

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
opensuse:ansible2.9.21-lp152.2.7.1 · openSUSE:Leap 15.2Package registry (OSV)
opensuse:dracut-saltboot0.1.1627546504.96a0b3e-lp152.2.26.1 · openSUSE:Leap 15.2Package registry (OSV)
opensuse:golang-github-prometheus-prometheus2.27.1-lp152.3.13.1 · openSUSE:Leap 15.2Package registry (OSV)
opensuse:mgr-cfg4.2.3-1.18.1 · openSUSE:Leap 15.3Package registry (OSV)
opensuse:mgr-custom-info4.2.2-1.12.1 · openSUSE:Leap 15.3Package registry (OSV)
opensuse:mgr-osad4.2.6-1.30.1 · openSUSE:Leap 15.3Package registry (OSV)
opensuse:mgr-push4.2.3-1.12.1 · openSUSE:Leap 15.3Package registry (OSV)
opensuse:mgr-virtualization4.2.2-1.20.1 · openSUSE:Leap 15.3Package registry (OSV)
opensuse:rhnlib4.2.4-3.28.1 · openSUSE:Leap 15.3Package registry (OSV)
opensuse:spacecmd4.2.11-3.62.1 · openSUSE:Leap 15.3Package registry (OSV)
opensuse:spacewalk-client-tools4.2.12-3.44.1 · openSUSE:Leap 15.3Package registry (OSV)
opensuse:spacewalk-koan4.2.4-3.21.1 · openSUSE:Leap 15.3Package registry (OSV)
suse:golang-github-prometheus-prometheus2.27.1-3.8.1 · SUSE:Enterprise Storage 6Package registry (OSV)
suse:grafana7.5.7-1.21.2 · SUSE:Manager Client Tools 12Package registry (OSV)
suse:mgr-cfg4.2.3-1.18.2 · SUSE:Manager Client Tools 12Package registry (OSV)
suse:mgr-custom-info4.2.2-1.12.2 · SUSE:Manager Client Tools 12Package registry (OSV)
suse:mgr-osad4.2.6-1.30.2 · SUSE:Manager Client Tools 12Package registry (OSV)
suse:mgr-push4.2.3-1.12.2 · SUSE:Manager Client Tools 12Package registry (OSV)
suse:mgr-virtualization4.2.2-1.20.2 · SUSE:Manager Client Tools 12Package registry (OSV)
suse:rhnlib4.2.4-21.34.2 · SUSE:Manager Client Tools 12Package registry (OSV)
suse:spacecmd4.2.11-38.85.2 · SUSE:Manager Client Tools 12Package registry (OSV)
suse:spacewalk-client-tools4.2.12-52.53.2 · SUSE:Manager Client Tools 12Package registry (OSV)
suse:spacewalk-koan4.2.4-24.24.2 · SUSE:Manager Client Tools 12Package registry (OSV)
suse:spacewalk-oscap4.2.2-19.18.2 · SUSE:Manager Client Tools 12Package 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

  • Nuclei detection template ×1

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
Nuclei detection templateNuclei template CVE-2021-29622 —

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.

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.
  • No account or password is required.
  • 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
None
User interaction
Required
Scope
Changed
Confidentiality impact
Low
Integrity impact
Low
Availability impact
None

Weakness class (CWE)

CWE-601 · URL Redirection to Untrusted Site ('Open Redirect')

CVSS vector

CVSS:3.1/AV:N/AC:L/PR:N/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✗ → ✓

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

References

Show all references (2 more)

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

All records