Skip to main content
Public proof of conceptFix available

CVE-2023-27856

A public proof of concept exists; no exploitation attested.

  • Published2023-03-22
  • WeaknessCWE-22

Am I affected?

With a domain, we read the version its public headers and pages expose. A distribution build can carry the fix under an older number.

Description

In affected versions, path traversal exists when processing a message of type 8 in Rockwell Automation's ThinManager ThinServer. An unauthenticated remote attacker can exploit this vulnerability to download arbitrary files on the disk drive where ThinServer.exe is installed.

Timeline

dates in UTC
  1. 2023-03-2200:15CVE publishedNVD

Observed activity

isMalicious corpus · updated 2026-11-03 21:37 UTC
Indicators tagged with this CVE, per day0 indicators over 7 days
Block these indicators
  • Firewall list (EDL, text): https://api.ismalicious.com/edl/cve/CVE-2023-27856?format=txt
  • CSV export: https://api.ismalicious.com/edl/cve/CVE-2023-27856?format=csv
  • TAXII collection of exploited CVEs
  • The EDL and CSV take an API key on the Pro plan.

Versions per branch

NVD
Rockwellautomation thinmanager
BranchAffectedFixed in
10.0≥ 6.0.0, ≤ 10.0.2no fix published
11.0≥ 11.0.0, ≤ 11.0.5no fix published
11.1≥ 11.1.0, ≤ 11.1.5no fix published
11.2≥ 11.2.0, ≤ 11.2.6no fix published
12.0≥ 12.0.0, ≤ 12.0.4no fix published
12.1≥ 12.1.0, ≤ 12.1.5no fix published
13.0= 13.0.0no fix published
13.0= 13.0.1no fix published

as publishedRanges as NVD and OSV publish them; a distribution’s build can be fixed under an older number.

Products declared by the CNA1 product

As Rockwell, the CNA that assigned this CVE, declared them in the CVE record; versions as written.

  • Rockwell Automation ThinManager ThinServerother versions: not affected
    Affected
    • = 6.x - 10.xno fix stated
    • = 11.0.0 - 11.0.5no fix stated
    • = 11.1.0 - 11.1.5no fix stated
    • = 11.2.0 - 11.2.6no fix stated
    • = 12.0.0 - 12.0.4no fix stated
    • = 12.1.0 - 12.1.5no fix stated
    • = 13.0.0 - 13.0.1no fix stated

Source: the CNA record (CVE Program), © The MITRE Corporation,CVE Terms of UseCVE recordupdated 2023-03-22

Distribution builds and vendor advisories

Packages from OSV.dev and products from the vendors' CSAF advisories.

version not verifiedVersions not verified: read as OSV.dev and the vendors publish them, not checked against each vendor's release list.

Vendor advisories

  • ICSA-23-080-06 CISA7 known affected

    Rockwell Automation ThinManager

    ThinManager ThinServer: Versions 6.x - 10.x · ThinManager ThinServer: Versions 11.0.0 - 11.0.5 · ThinManager ThinServer: Versions 11.1.0 - 11.1.5 · +4 more

Full record on NVD

Fix

  1. Vendor fix CISA ICSA-23-080-06 · 7 productsRockwell Automation customers are directed towards the risk mitigations provided below, and are encouraged, when possible, to combine these mitigations with the general security guidelines to employ multiple strategies simultaneously.
  2. Vendor fix CISA ICSA-23-080-06 · 7 productsRockwell Automation has released the following updates for the affected versions:
  3. Vendor fix CISA ICSA-23-080-06 · 7 productsVersions 6.x - 10.x: These versions are retired. Please update to supported version.
  4. Vendor fix CISA ICSA-23-080-06 · 7 productsVersions 11.0.0 - 11.0.5: Update to v11.0.6
  5. Vendor fix CISA ICSA-23-080-06 · 7 productsVersions 11.1.0 - 11.1.5: Update to v11.1.6
  6. Vendor fix CISA ICSA-23-080-06 · 7 productsVersions 11.2.0 - 11.2.6: Update to v11.2.7

Advisories and patches

Detection

Nuclei template
none so far
ProjectDiscovery
Exploit-DB
no entry
Exploit-DB
Proof-of-concept repositories
none listed
PoC-in-GitHub
Metasploit modules
1 moduleauxiliary/gather/thinmanager_traversal_downloadrank: normalModule metadata: Metasploit Framework, © Rapid7, Inc., BSD-3-Clause.
Metasploit Framework

Sources

Identifiers

Technical details

CVSS v3 Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
Published
2023-03-22
Last Modified
2026-06-17
NVD status
Modified
GitHub Advisory
GHSA-9hjj-m2fc-f62r

Frequently asked questions

What is CVE-2023-27856?

In affected versions, path traversal exists when processing a message of type 8 in Rockwell Automation's ThinManager ThinServer. An unauthenticated remote attacker can exploit this vulnerability to download arbitrary files on the disk drive where ThinServer.exe is installed.

Is CVE-2023-27856 actively exploited?

Active exploitation of CVE-2023-27856 has not been confirmed. Its EPSS score was 77.2% on 2026-11-03, the estimated probability of exploitation in the next 30 days.

What is the CVSS score for CVE-2023-27856?

CVE-2023-27856 has a CVSS v3 base score of 7.5 (HIGH severity), with vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N.

Hear about the next vulnerability in your software

Surveillance reads the versions in your stack — a domain, a lockfile or a list — checks each CVE against the ranges its sources publish, and alerts you when one you run is exploited or enters CISA KEV. A version it cannot read stays « version not verified ».

Get alerts for this productCISA KEV additions, November 2026Search CVEs

No credit card required · No monthly cap on website lookups · 250 API requests/month

Go further

Related vulnerabilities

Same product first, then the same vendor advisory and the same publication week.

Back to CVE Database

Sources for this record