Skip to main content
Public proof of conceptFix available

CVE-2017-12611

A public proof of concept exists; no exploitation attested.

  • Published2017-09-20
  • WeaknessCWE-20

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 Apache Struts 2.0.0 through 2.3.33 and 2.5 through 2.5.10.1, using an unintentional expression in a Freemarker tag instead of string literals can lead to a RCE attack.

Timeline

dates in UTC
  1. 2017-09-2017:29CVE publishedNVD
  2. 2026-10-2319:23First public proof of conceptPoC-in-GitHub
  3. 2026-10-2319:23EPSS crossed 10 %FIRST EPSS

Observed activity

isMalicious corpus · updated 2026-10-23 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-2017-12611?format=txt
  • CSV export: https://api.ismalicious.com/edl/cve/CVE-2017-12611?format=csv
  • TAXII collection of exploited CVEs
  • The EDL and CSV take an API key on the Pro plan.

Versions per branch

NVD · OSV
Apache struts
BranchAffectedFixed in
2.0= 2.0.1no fix published
2.0= 2.0.2no fix published
2.0= 2.0.3no fix published
2.0= 2.0.4no fix published
2.0= 2.0.5no fix published
2.0= 2.0.6no fix published
2.0= 2.0.7no fix published
2.0= 2.0.8no fix published
2.0= 2.0.9no fix published
2.0= 2.0.10no fix published
2.0= 2.0.11no fix published
2.0= 2.0.11.1no fix published
struts2-core
BranchAffectedFixed in
2.5≥ 2.5.0, < 2.5.112.5.11
2.x≥ 2.0.1, < 2.3.342.3.34

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

Fix

Advisories and patches

Detection

read 2026-10-23 19:23 UTC
Nuclei template
none so far
ProjectDiscovery
Exploit-DB
EDB-44556
Exploit-DB
Proof-of-concept repositories
3 repositories, unverifiedbrianwrf/S2-053-CVE-2017-12611tcetin704/CVE-2017-12611zeynepsilao/CVE-2017-12611_Exploit
PoC-in-GitHub

Sources

  • NVDCVSS 3.09.8read 2026-10-23
  • NVDCVSS 2.07.5read 2026-10-23
  • NVDweakness (CWE)CWE-20read 2026-10-23
  • FIRST EPSSEPSS score87.1 %read 2026-10-23
  • PoC-in-GitHubproof of concept3read 2026-10-23
  • OSVaffected packages—

Technical details

CVSS v3 Vector
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Published
2017-09-20
Last Modified
2026-06-17
NVD status
Modified

Frequently asked questions

What is CVE-2017-12611?

In Apache Struts 2.0.0 through 2.3.33 and 2.5 through 2.5.10.1, using an unintentional expression in a Freemarker tag instead of string literals can lead to a RCE attack.

Is CVE-2017-12611 actively exploited?

Active exploitation of CVE-2017-12611 has not been confirmed. Its EPSS score was 87.1% on 2026-10-23, the estimated probability of exploitation in the next 30 days.

What is the CVSS score for CVE-2017-12611?

CVE-2017-12611 has a CVSS v3 base score of 9.8 (CRITICAL severity), with vector string CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.

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, October 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