CVE-2017-12611

CRITICALNVD 9.89.8—
EchelonGraph scoreHIGH confidence

Score elevated to 9.8 because EPSS predicts 94% probability of exploitation within the next 30 days (top 0.1% of all CVEs). NVD baseline CVSS 9.8 retained for reference. Confidence: see factors.

Triggered by: EPSS exploit prediction ≥85%
Sources: epss, nvd
Weaponized
9.8
EchelonGraph verdictPatch this weekExploitation is likely or a public exploit exists.
  • High exploitation likelihood — EPSS 88%
CISA-KEV: Not listedEPSS: 88%CVSS: 9.8Exploit: NoneExposed: 0

No vendor fix yet — apply a workaround or compensating control (WAF / firewall / segmentation) and watch for a patch.

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.

CVSS v3
9.8
EG Score
9.8(high)
EPSS
99.7%
KEV
Not listed

Published

September 20, 2017

Last Modified

May 13, 2026

Advisory Details (2)

Auto-updated May 17, 2026
No patch confirmed yet.
generic

S2-053 - Apache Struts 2 Wiki - Apache Software Foundation

https://struts.apache.org/docs/s2-053.html
generic
http://www.securityfocus.com/bid/100829

Affected Packages

(1 across 1 ecosystem)
Maven(1)
PackageVulnerable rangeFixed inDependents
org.apache.struts:struts2-core2.5 ... 2.5.8 (7 versions)2.5.11—

Data Freshness Timeline

(refreshed 3× in last 7d / 12× in last 30d)

Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. Most recent first.

  1. 2026-07-08 15:10 UTCEPSS rescore
  2. 2026-07-08 04:57 UTCOSV refresh
  3. 2026-07-07 13:42 UTCEPSS rescore
  4. 2026-06-28 04:53 UTCEPSS rescore
  5. 2026-06-24 14:02 UTCEPSS rescore
  6. 2026-06-23 21:30 UTCEPSS rescore
  7. 2026-06-21 14:54 UTCEPSS rescore
  8. 2026-06-21 14:54 UTCEPSS rescore
  9. 2026-06-19 16:55 UTCOSV refresh
  10. 2026-06-18 17:50 UTCEPSS rescore
  11. 2026-06-17 17:50 UTCEPSS rescore
  12. 2026-06-15 17:45 UTCEPSS rescore
  13. 2026-06-06 13:45 UTCEPSS rescore
  14. 2026-06-06 13:45 UTCEPSS rescore
  15. 2026-06-05 22:44 UTCEPSS rescore
  16. 2026-05-30 22:53 UTCOSV refresh
  17. 2026-05-28 13:42 UTCEPSS rescore
  18. 2026-05-28 13:42 UTCEPSS rescore
  19. 2026-05-22 21:15 UTCEPSS rescore
  20. 2026-05-22 21:15 UTCEPSS rescore
  21. 2026-05-22 21:15 UTCEPSS rescore
  22. 2026-05-20 09:07 UTCEG score recompute
  23. 2026-05-20 05:21 UTCEG score recompute
  24. 2026-05-20 01:37 UTCEG score recompute
  25. 2026-05-19 21:53 UTCEG score recompute
Show 8 more
  1. 2026-05-19 18:09 UTCEG score recompute
  2. 2026-05-19 14:25 UTCEG score recompute
  3. 2026-05-19 10:41 UTCEG score recompute
  4. 2026-05-19 06:56 UTCEG score recompute
  5. 2026-05-19 03:12 UTCEG score recompute
  6. 2026-05-18 23:25 UTCEG score recompute
  7. 2026-05-18 21:30 UTCEPSS rescore
  8. 2026-05-18 21:30 UTCEPSS rescore

Publicly available exploits

(3 references)

Working exploit code is in the public domain (1 GitHub PoC) (1 Exploit-DB entry). Defenders should treat patch urgency accordingly — public PoCs typically lead to mass-exploitation within 24-72 hours.

  • Exploit-DBEDB-44556✓ verified
    First seen Sep 8, 2017

    Apache Struts 2.0.1 < 2.3.33 / 2.5 < 2.5.10 - Arbitrary Code Execution

    Open source ↗
  • GitHub PoCbrianwrf/S2-053-CVE-2017-12611
    First seen Sep 8, 2017

    A simple script for exploit RCE for Struts 2 S2-053(CVE-2017-12611)

    Open source ↗
  • Nucleihttp/cves/2017/CVE-2017-12611.yaml
    First seen Jan 1, 2017

    Apache Struts2 S2-053 - Remote Code Execution

    Open source ↗

Frequently asked(5)

What is CVE-2017-12611?
CVE-2017-12611 is a critical vulnerability published on September 20, 2017. 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.
When was CVE-2017-12611 disclosed?
CVE-2017-12611 was first published in the National Vulnerability Database on September 20, 2017, with the most recent update on May 13, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2017-12611 actively exploited?
CVE-2017-12611 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 99.7% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
What is the CVSS score of CVE-2017-12611?
CVE-2017-12611 has a CVSS v3 base score of 9.8 (NVD).
How do I remediate CVE-2017-12611?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2017-12611, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

Dependency Blast Radius

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