CVE-2020-17530

CRITICALNVD 9.89.8—
EchelonGraph scoreHIGH confidence

Score elevated to 9.8 because this CVE is listed on the CISA Known Exploited Vulnerabilities catalog (added 2021-11-03), indicating real-world exploitation has been confirmed by US federal agencies. NVD baseline CVSS 9.8 retained for reference. Confidence: HIGH.

Triggered by: CISA KEV (actively exploited)
Sources: cisa_kev, epss, nvd
Trending — 3 sources updated this weekExploited in the wild
9.8
EchelonGraph verdictPatch nowTreat as an emergency — this is being exploited.
  • Actively exploited in the wild (CISA-KEV)
CISA-KEV: ExploitedEPSS: 96%CVSS: 9.8Exploit: NoneExposed: 0

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

Forced OGNL evaluation, when evaluated on raw user input in tag attributes, may lead to remote code execution. Affected software : Apache Struts 2.0.0 - Struts 2.5.25.

CVSS v3
9.8
EG Score
9.8(high)
EG Risk
—
EPSS
99.9%
KEV
⚠ Exploited

Published

December 11, 2020

Last Modified

October 27, 2025

Advisory Details (5)

Auto-updated Jun 1, 2026
No patch confirmed yet.
generic

NetApp Product Security

https://security.netapp.com/advisory/ntap-20210115-0005/
generic

S2-061 - Apache Struts 2 Wiki - Apache Software Foundation

https://cwiki.apache.org/confluence/display/WW/S2-061
generic

oss-security - CVE-2021-31805: Apache Struts: Forced OGNL evaluation, when evaluated on raw not validated user input in tag attributes, may lead to RCE.

http://www.openwall.com/lists/oss-security/2022/04/12/6
generic

Packet Storm

http://packetstormsecurity.com/files/160721/Apache-Struts-2-Forced-Multi-OGNL-Evaluation.html
generic

JVN#43969166: Apache Struts 2 vulnerable to remote code execution (S2-061)

http://jvn.jp/en/jp/JVN43969166/index.html

Affected Packages

(1 across 1 ecosystem)
Maven(1)
PackageVulnerable rangeFixed inDependents
org.apache.struts:struts2-core2.0.11 ... 2.5.8 (75 versions)2.5.26—

Weakness Classification(1)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

Data Freshness Timeline

(refreshed 7× in last 7d / 27× 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. 2026-07-22 22:36 UTCEG score recompute
  2. 2026-07-22 19:40 UTCCISA KEV update
  3. 2026-07-22 15:20 UTCEG score recompute
  4. 2026-07-22 14:05 UTCEPSS rescore
  5. 2026-07-21 14:37 UTCCISA KEV update
  6. 2026-07-17 09:16 UTCEG score recompute
  7. 2026-07-16 17:04 UTCCISA KEV update
  8. 2026-07-15 16:49 UTCCISA KEV update
  9. 2026-07-15 15:04 UTCCISA KEV update
  10. 2026-07-14 18:05 UTCCISA KEV update
  11. 2026-07-13 22:27 UTCEPSS rescore
  12. 2026-07-13 22:27 UTCEPSS rescore
  13. 2026-07-13 17:07 UTCCISA KEV update
  14. 2026-07-13 06:10 UTCEPSS rescore
  15. 2026-07-13 06:10 UTCEPSS rescore
  16. 2026-07-11 08:25 UTCEPSS rescore
  17. 2026-07-11 08:25 UTCEPSS rescore
  18. 2026-07-10 17:52 UTCCISA KEV update
  19. 2026-07-07 19:01 UTCCISA KEV update
  20. 2026-07-07 17:16 UTCCISA KEV update
  21. 2026-07-01 19:16 UTCCISA KEV update
  22. 2026-06-29 19:12 UTCCISA KEV update
  23. 2026-06-27 03:06 UTCEPSS rescore
  24. 2026-06-25 19:15 UTCCISA KEV update
  25. 2026-06-23 21:31 UTCEPSS rescore
Show 25 more
  1. 2026-06-23 21:31 UTCEPSS rescore
  2. 2026-06-23 17:44 UTCCISA KEV update
  3. 2026-06-18 16:13 UTCCISA KEV update
  4. 2026-06-17 17:50 UTCEPSS rescore
  5. 2026-06-16 19:33 UTCCISA KEV update
  6. 2026-06-16 17:50 UTCEPSS rescore
  7. 2026-06-16 17:50 UTCEPSS rescore
  8. 2026-06-15 19:33 UTCCISA KEV update
  9. 2026-06-15 17:46 UTCEPSS rescore
  10. 2026-06-12 17:35 UTCCISA KEV update
  11. 2026-06-11 19:10 UTCCISA KEV update
  12. 2026-06-09 18:42 UTCCISA KEV update
  13. 2026-06-09 17:12 UTCCISA KEV update
  14. 2026-06-08 19:16 UTCCISA KEV update
  15. 2026-06-08 17:26 UTCCISA KEV update
  16. 2026-06-05 22:43 UTCCISA KEV update
  17. 2026-06-03 19:09 UTCCISA KEV update
  18. 2026-06-02 18:32 UTCCISA KEV update
  19. 2026-06-01 20:42 UTCCISA KEV update
  20. 2026-05-29 22:20 UTCCISA KEV update
  21. 2026-05-28 13:43 UTCEPSS rescore
  22. 2026-05-28 13:43 UTCEPSS rescore
  23. 2026-05-27 20:35 UTCCISA KEV update
  24. 2026-05-26 19:13 UTCCISA KEV update
  25. 2026-05-23 04:23 UTCEG score recompute

Publicly available exploits

(8 references)

Working exploit code is in the public domain (1 Metasploit module) (6 GitHub PoCs). Defenders should treat patch urgency accordingly — public PoCs typically lead to mass-exploitation within 24-72 hours.

  • GitHub PoCuzzzval/CVE-2020-17530
    First seen Jan 7, 2021
    Open source ↗
  • GitHub PoCCyborgSecurity/CVE-2020-17530
    First seen Dec 30, 2020
    Open source ↗
  • GitHub PoCfengziHK/CVE-2020-17530-strust2-061
    First seen Dec 14, 2020

    CVE-2020-17530-strust2-061

    Open source ↗
  • GitHub PoCAl1ex/CVE-2020-17530
    First seen Dec 13, 2020

    S2-061 CVE-2020-17530

    Open source ↗
  • GitHub PoCwuzuowei/CVE-2020-17530
    First seen Dec 10, 2020

    S2-061 的payload，以及对应简单的PoC/Exp

    Open source ↗
  • GitHub PoCka1n4t/CVE-2020-17530
    First seen Dec 9, 2020
    Open source ↗
  • Metasploitexploit/multi/http/struts2_multi_eval_ognl✓ verified
    First seen Sep 14, 2020

    Apache Struts 2 Forced Multi OGNL Evaluation

    Open source ↗
  • Nucleihttp/cves/2020/CVE-2020-17530.yaml
    First seen Jan 1, 2020

    Apache Struts 2.0.0-2.5.25 - Remote Code Execution

    Open source ↗

Related CVEs(same CWE)

Frequently asked(6)

What is CVE-2020-17530?
CVE-2020-17530 is a critical vulnerability published on December 11, 2020. Forced OGNL evaluation, when evaluated on raw user input in tag attributes, may lead to remote code execution. Affected software : Apache Struts 2.0.0 - Struts 2.5.25.
When was CVE-2020-17530 disclosed?
CVE-2020-17530 was first published in the National Vulnerability Database on December 11, 2020, with the most recent update on October 27, 2025. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2020-17530 actively exploited?
Yes. CISA added CVE-2020-17530 to the Known Exploited Vulnerabilities catalog on November 3, 2021, affecting Apache Struts. KEV listing indicates confirmed exploitation in the wild; this CVE warrants immediate patching attention.
What is the CVSS score of CVE-2020-17530?
CVE-2020-17530 has a CVSS v3 base score of 9.8 (NVD).
Which products are affected by CVE-2020-17530?
CVE-2020-17530 affects Apache Struts. The full affected-products list, including version ranges and fixed versions, is shown in the Affected Packages section of this page.
How do I remediate CVE-2020-17530?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2020-17530, 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

See which npm, PyPI, Go, and Maven packages are affected by CVE-2020-17530

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