CVE-2020-8644

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, ghsa, nvd
Trending — 4 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: 87%CVSS: 9.8Exploit: NoneExposed: 0

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

PlaySMS before 1.4.3 does not sanitize inputs from a malicious string.

CVSS v3
9.8
EG Score
9.8(high)
EG Risk
99(Act)
EG Risk 99/100SSVC: Act

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%
Action: Fix now — active exploitation, automatable, high impact.
EPSS
99.7%
KEV
⚠ Exploited

Published

February 5, 2020

Last Modified

November 7, 2025

Advisory Details (3)

Auto-updated Jun 1, 2026
⚠️ Active exploitation confirmed. Patch available. Sources: cisa.
cisa Patch Available🔴 Active Exploitation

Known Exploited Vulnerabilities Catalog | CISA

Known Exploited Vulnerabilities Catalog | CISA. Listed in CISA Known Exploited Vulnerabilities catalog.

https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2020-8644
generic

Cyber Security Research | NCC Group

https://research.nccgroup.com/2020/02/11/technical-advisory-playsms-pre-authentication-remote-code-execution-cve-2020-8644/
generic

playSMS 1.4.3 has been released – playSMS FOSS Project

https://playsms.org/2020/02/05/playsms-1-4-3-has-been-released/

Weakness Classification(3)

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

Data Freshness Timeline

(refreshed 49× in last 7d / 210× 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 379 total refreshes for this CVE.

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

Publicly available exploits

(4 references)

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

  • GitHub PoCH3rm1tR3b0rn/CVE-2020-8644-PlaySMS-1.4
    First seen Jul 25, 2023

    Python script to exploit PlaySMS before 1.4.3

    Open source ↗
  • Exploit-DBEDB-48335✓ verified
    First seen Apr 16, 2020

    PlaySMS - index.php Unauthenticated Template Injection Code Execution (Metasploit)

    Open source ↗
  • Metasploitexploit/multi/http/playsms_template_injection✓ verified
    First seen Feb 5, 2020

    PlaySMS index.php Unauthenticated Template Injection Code Execution

    Open source ↗
  • Nucleihttp/cves/2020/CVE-2020-8644.yaml
    First seen Jan 1, 2020

    playSMS <1.4.3 - Remote Code Execution

    Open source ↗

Related CVEs(same CWE)

Frequently asked(6)

What is CVE-2020-8644?
CVE-2020-8644 is a critical vulnerability published on February 5, 2020. PlaySMS before 1.4.3 does not sanitize inputs from a malicious string.
When was CVE-2020-8644 disclosed?
CVE-2020-8644 was first published in the National Vulnerability Database on February 5, 2020, with the most recent update on November 7, 2025. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2020-8644 actively exploited?
Yes. CISA added CVE-2020-8644 to the Known Exploited Vulnerabilities catalog on November 3, 2021, affecting PlaySMS PlaySMS. KEV listing indicates confirmed exploitation in the wild; this CVE warrants immediate patching attention.
What is the CVSS score of CVE-2020-8644?
CVE-2020-8644 has a CVSS v3 base score of 9.8 (NVD).
Which products are affected by CVE-2020-8644?
CVE-2020-8644 affects PlaySMS PlaySMS. 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-2020-8644?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2020-8644, 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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