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
Exploited in the wild
9.8EG
EchelonGraph verdictPatch nowTreat as an emergency — this is being exploited.
  • Actively exploited in the wild (CISA-KEV)
CISA-KEV: ExploitedEPSS PROB: 96%CVSS: 9.8Exploit: cisa kev · ssvc active · Metasploit · epss top5pct · epss high · public exploitExposed services: Not assessed

A fix is available — apply it.

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
9.8CRITICALhigh confidence
EG Risk
99
EG Risk 99/100CISA SSVC

EG Risk is EchelonGraph's 0–100 priority score: it fuses intrinsic severity with real-world exploitation and automatability so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner. Distinct from the 0–10 EG Score (severity).

How it’s computed
Severity98% × 45%
Exploitation100% × 40%
Automatability100% × 15%
CISA SSVC: Attend at low mission impact; Act at medium or high.
Action: A fix is available. Apply it sooner than your standard update timelines at low mission impact and as soon as possible at medium or high.
EPSS PROB
96%
EPSS %ILE
99th
KEV
⚠ Exploited

CISA SSVCAttend at low mission impact; Act at medium or high.

A fix is available. Apply it sooner than your standard update timelines at low mission impact and as soon as possible at medium or high.

Exploitation active (CISA Vulnrichment) · Automatable yes (CISA Vulnrichment) · Technical impact total (CISA Vulnrichment). Mission impact is CISA's Mission & Well-being decision point, and only you can judge it: high means the affected system is essential to your organisation's mission, or its compromise could cause irreversible harm to people. CISA's decision table

Published

December 11, 2020

Last Modified

October 27, 2025

Advisory Details (5)

Auto-updated Oct 9, 2026
Patch available.
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 rangeFix by version rangeDependents
org.apache.struts:struts2-core2.0.11 ... 2.5.8 (75 versions)
  • 2.0.0 up to 2.5.26: fixed in 2.5.26
—

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 2× in last 7d / 25× 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.

Showing the most recent 100 of 123 total refreshes for this CVE.

  1. 2026-10-08 00:54 UTCEG score recompute
  2. 2026-10-07 23:44 UTCEPSS rescore
  3. 2026-09-30 15:34 UTCEG score recompute
  4. 2026-09-30 14:59 UTCEPSS rescore
  5. 2026-09-28 22:48 UTCEG score recompute
  6. 2026-09-27 21:51 UTCCISA KEV update
  7. 2026-09-25 19:35 UTCCISA KEV update
  8. 2026-09-25 14:55 UTCCISA KEV update
  9. 2026-09-24 19:31 UTCCISA KEV update
  10. 2026-09-22 19:36 UTCCISA KEV update
  11. 2026-09-22 15:18 UTCEG score recompute
  12. 2026-09-22 14:43 UTCEPSS rescore
  13. 2026-09-21 20:52 UTCEG score recompute
  14. 2026-09-21 20:28 UTCEPSS rescore
  15. 2026-09-21 19:09 UTCCISA KEV update
  16. 2026-09-18 22:43 UTCEG score recompute
  17. 2026-09-18 19:23 UTCEPSS rescore
  18. 2026-09-18 19:20 UTCCISA KEV update
  19. 2026-09-18 14:15 UTCCISA KEV update
  20. 2026-09-16 14:10 UTCCISA KEV update
  21. 2026-09-14 19:24 UTCCISA KEV update
  22. 2026-09-12 15:08 UTCEG score recompute
  23. 2026-09-12 14:56 UTCEPSS rescore
  24. 2026-09-11 18:49 UTCCISA KEV update
  25. 2026-09-10 19:28 UTCCISA KEV update
Show 75 more
  1. 2026-09-10 11:27 UTCEG score recompute
  2. 2026-09-10 09:29 UTCEPSS rescore
  3. 2026-09-09 19:08 UTCCISA KEV update
  4. 2026-09-08 18:54 UTCCISA KEV update
  5. 2026-09-06 14:50 UTCEG score recompute
  6. 2026-09-06 13:44 UTCEPSS rescore
  7. 2026-09-05 16:40 UTCEG score recompute
  8. 2026-09-05 15:24 UTCEPSS rescore
  9. 2026-09-04 17:38 UTCCISA KEV update
  10. 2026-09-02 17:33 UTCCISA KEV update
  11. 2026-09-02 14:31 UTCEG score recompute
  12. 2026-09-02 14:08 UTCEPSS rescore
  13. 2026-08-31 14:19 UTCCISA KEV update
  14. 2026-08-30 19:42 UTCEG score recompute
  15. 2026-08-30 19:14 UTCEPSS rescore
  16. 2026-08-28 23:18 UTCEG score recompute
  17. 2026-08-27 17:22 UTCCISA KEV update
  18. 2026-08-26 17:41 UTCCISA KEV update
  19. 2026-08-24 18:52 UTCCISA KEV update
  20. 2026-08-24 15:48 UTCEG score recompute
  21. 2026-08-24 12:08 UTCEG score recompute
  22. 2026-08-21 16:49 UTCCISA KEV update
  23. 2026-08-20 23:14 UTCEG score recompute
  24. 2026-08-20 22:52 UTCEPSS rescore
  25. 2026-08-20 17:06 UTCCISA KEV update
  26. 2026-08-19 17:44 UTCEG score recompute
  27. 2026-08-19 17:33 UTCCISA KEV update
  28. 2026-08-19 17:00 UTCEPSS rescore
  29. 2026-08-18 16:58 UTCCISA KEV update
  30. 2026-08-17 13:56 UTCCISA KEV update
  31. 2026-08-16 04:37 UTCEG score recompute
  32. 2026-08-16 02:11 UTCEPSS rescore
  33. 2026-08-11 19:32 UTCCISA KEV update
  34. 2026-08-11 14:05 UTCEG score recompute
  35. 2026-08-07 17:09 UTCCISA KEV update
  36. 2026-08-05 17:25 UTCCISA KEV update
  37. 2026-08-04 17:02 UTCCISA KEV update
  38. 2026-08-03 19:22 UTCCISA KEV update
  39. 2026-07-30 10:17 UTCEG score recompute
  40. 2026-07-29 19:27 UTCCISA KEV update
  41. 2026-07-27 19:24 UTCCISA KEV update
  42. 2026-07-27 17:17 UTCCISA KEV update
  43. 2026-07-26 13:26 UTCEG score recompute
  44. 2026-07-26 02:16 UTCEG score recompute
  45. 2026-07-25 14:15 UTCEPSS rescore
  46. 2026-07-25 14:14 UTCEPSS rescore
  47. 2026-07-24 14:14 UTCEPSS rescore
  48. 2026-07-23 01:50 UTCEG score recompute
  49. 2026-07-22 22:36 UTCEG score recompute
  50. 2026-07-22 19:40 UTCCISA KEV update
  51. 2026-07-22 15:20 UTCEG score recompute
  52. 2026-07-22 14:05 UTCEPSS rescore
  53. 2026-07-21 14:37 UTCCISA KEV update
  54. 2026-07-17 09:16 UTCEG score recompute
  55. 2026-07-16 17:04 UTCCISA KEV update
  56. 2026-07-15 16:49 UTCCISA KEV update
  57. 2026-07-15 15:04 UTCCISA KEV update
  58. 2026-07-14 18:05 UTCCISA KEV update
  59. 2026-07-13 22:27 UTCEPSS rescore
  60. 2026-07-13 22:27 UTCEPSS rescore
  61. 2026-07-13 17:07 UTCCISA KEV update
  62. 2026-07-13 06:10 UTCEPSS rescore
  63. 2026-07-13 06:10 UTCEPSS rescore
  64. 2026-07-11 08:25 UTCEPSS rescore
  65. 2026-07-11 08:25 UTCEPSS rescore
  66. 2026-07-10 17:52 UTCCISA KEV update
  67. 2026-07-07 19:01 UTCCISA KEV update
  68. 2026-07-07 17:16 UTCCISA KEV update
  69. 2026-07-01 19:16 UTCCISA KEV update
  70. 2026-06-29 19:12 UTCCISA KEV update
  71. 2026-06-27 03:06 UTCEPSS rescore
  72. 2026-06-25 19:15 UTCCISA KEV update
  73. 2026-06-23 21:31 UTCEPSS rescore
  74. 2026-06-23 21:31 UTCEPSS rescore
  75. 2026-06-23 17:44 UTCCISA KEV update

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.

  • Metasploitexploit/multi/http/struts2_multi_eval_ognl✓ verified
    First seen Sep 14, 2020

    Apache Struts 2 Forced Multi OGNL Evaluation

    Open source ↗
  • 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 ↗
  • 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 product + 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 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 attention. A fix is available. Apply it.
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 affected packages EchelonGraph has on record, with version ranges, are listed in the Affected Packages section of this page.
How do I remediate CVE-2020-17530?
A fix for CVE-2020-17530 is available: update to the fixed version the vendor names in its advisory.

Dependency Blast Radius

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