Skip to content
Noroxi
NVD / CVE Program· CNA crafter

CVE-2021-23266: Improper Output Neutralization for Logs in Crafter Studio

MediumCVSS 4.3 · v3.1—No exploit Fix available

Noroxi assessment

Priority: Monitor (action score 17/100)

  • 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: 0.56% (FIRST EPSS).
  • 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: org.craftercms:craftercms (Maven) 3.1.18.

Low priority for now. Upgrade to org.craftercms:craftercms (Maven) 3.1.18 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

An anonymous user can craft a URL with text that ends up in the log viewer as is. The text can then include textual messages to mislead the administrator.

Published
May 16, 2022
Updated
Jun 16, 2026
EPSS
0.5% · 47th percentile

Report tools

JSON

Action score

17

Monitor

Low priority for now.

CVSS
17 / 40 · 4.3 / 10
CISA KEV
0 / 30 · Not listed
EPSS
0 / 30 · 0.5%

CNA vs NVD score

NVD
4.3
CNA · crafter
4.3
agree

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

Follow CVE-2021-23266

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

One daily email digest (06:00 UTC); connect a webhook for KEV listings and weaponized exploits every 10 minutes on paid plans, on the hour on the free plan.

Your free account also gets you

  • CVE alerts: add the products and versions you run, get the new CVEs that affect them
  • Uptime monitoring: 1 site, instant email when it goes down
  • Add your domain: subdomains and takeover risk scanned every week (1 domain)
  • 10 scans an hour on the security tools, at most 30 a day (3 a day without an account), an API key and MCP
  • All your scans in one panel: findings, what changed in the last scan, a report per domain or per client (PDF, share link)
All free tools

Sign up with email · Have an account? Sign in

Free account, no card. Unfollow any time.

Don't want an account? Get "Exploited this week" by email every MondayDon't want an account? RSS feed for craftercms records
Is your version affected? Check it

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.

We use this product, ask for help

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
craftercmscrafter cms

Versions reported by the vendor

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

  • Crafter Software Crafter CMS

    • 3.1 and later · up to and including 3.1.17affected

Affected versions

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

  • craftercms crafter cms3.1 and later · before 3.1.18

Package-level exposure

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

EcosystemPackageAffected rangeFix
Mavenorg.craftercms:craftercmsfrom 3.1.0 · before 3.1.183.1.18

Same product

craftercms: all records

Other highest-scoring records for the same primary product.

  • CVE-2017-15681In Crafter CMS Crafter Studio 3.0.1 a directory traversal vulnerability exists which allows unauthenticated attackers to overwrite files…
    40Plan
  • CVE-2021-23264Transmission of Private Resources into a New Sphere ('Resource Leak') and Exposure of Resource to Wrong Sphere in Crafter Search
    36Monitor
  • CVE-2018-19907A Server-Side Template Injection issue was discovered in Crafter CMS 3.0.18.
    36Monitor

Published before and after this one in the same product

  • ← EarlierCVE-2021-23263Dec 2, 2021 · Transmission of Private Resources into a New Sphere ('Resource Leak') in Crafter Engine
    31Monitor
  • ← EarlierCVE-2021-23265May 16, 2022 · Improper Privilege Management in Crafter Studio
    17Monitor
  • Later →CVE-2021-23267May 16, 2022 · Improper Control of Dynamically-Managed Code Resources in Crafter Studio
    35Monitor

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:org.craftercms:craftercms3.1.18Package 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.

Credits

All researchers

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

Not on record for this CVE: EPSS history · patch commit or PR link · variant or chain candidate · public bounty program.

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
none
Integrity
low · data or configuration can be modified
Availability
none
Attack vector
Network
Attack complexity
Low
Privileges required
None
User interaction
Required
Scope
Unchanged
Confidentiality impact
None
Integrity impact
Low
Availability impact
None

Weakness class (CWE)

CWE-117 · Improper Output Neutralization for Logs

CVSS vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/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.

References

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

All records