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CVE-2017-12611

90
FAUCET Score

CVE-2017-12611 is a critical remote code execution (RCE) vulnerability affecting Apache Struts versions 2.0.0 through 2.3.33 and 2.5 through 2.5.10.1, stemming from the unintentional use of expressions in Freemarker tags. With a CVSS score of 9.8 (CRITICAL), this flaw allows unauthenticated attackers to execute arbitrary code with low attack complexity, leading to complete compromise of confidentiality, integrity, and availability. While not listed on the KEV catalog, exploit intelligence indicates readily available exploit code through ExploitDB and Nuclei templates, and it has garnered significant community discussion and media coverage, suggesting active exploitation potential.

Impacted Technologies

VendorProductVersion(s)CPE
2.0.1CPE matchmatch criteria
cpe:2.3:a:apache:struts:2.0.1:*:*:*:*:*:*:*
2.0.2CPE matchmatch criteria
cpe:2.3:a:apache:struts:2.0.2:*:*:*:*:*:*:*
2.0.3CPE matchmatch criteria
cpe:2.3:a:apache:struts:2.0.3:*:*:*:*:*:*:*
2.0.4CPE matchmatch criteria
cpe:2.3:a:apache:struts:2.0.4:*:*:*:*:*:*:*
2.0.5CPE matchmatch criteria
cpe:2.3:a:apache:struts:2.0.5:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.0

9.8CRITICAL

CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
Exploitability Score
3.9
Impact Score
5.9
CvssVersion
3.0

Exploit Intelligence

EPSS Score
87.12%
Probability of exploitation in next 30 days
EPSS Percentile
99.7%
Percentile rank of EPSS score among Peer Group
As of 2026-07-26
Model: v2026.06.15
Nuclei: CVE-2017-12611 · Feb 21, 2021
ExploitDB: EDB-44556 · Sep 8, 2017
This CVE's current EPSS score of 0.8712 is in the 99th percentile among its peer group of 36,833 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.1 Reddit, 0.3 Bluesky, 0.3 Mastodon, and 2.4 GitHub mentions.

Media Mentions

The average CVE in this peer group has 0.3 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (3)

mavenpatch availablevia ghsa
Product: org.apache.struts:struts2-coreFixed in: 2.3.34
mavenpatch availablevia ghsa
Product: org.apache.struts:struts2-coreFixed in: 2.5.11
oraclepatch availablevia nvd_reference
View patch

Vendor Advisories (2)

mavenGHSA-8fx9-5hx8-crhmcritical

Apache Struts 2.0.1 uses an unintentional expression in a Freemarker tag instead of string literal

Oct 16, 2018
redhatCVE-2017-12611Important

struts: RCE attack when using an unintentional expression in Freemarker tag instead of string literals

Sep 7, 2017

References

kb.netapp.com / support/s/article/ka51A000000CgttQAC/NTAP-20170911-0001
PatchThird Party Advisory
struts.apache.org / docs/s2-053.html
ExploitVendor Advisory
arubanetworks.com / assets/alert/ARUBA-PSA-2017-003.txt
MitigationThird Party Advisory
oracle.com / technetwork/security-advisory/alert-cve-2017-9805-3889403.html
PatchThird Party Advisory
securityfocus.com / bid/100829
Third Party AdvisoryVDB Entry