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
9.8EG
EchelonGraph verdictPatch nowTreat as an emergency — this is being exploited.
  • Actively exploited in the wild (CISA-KEV)
CISA-KEV: ExploitedEPSS PROB: 87%CVSS: 9.8Exploit: cisa kev · ssvc active · Metasploit · Exploit-DB (verified) · epss top5pct · epss high · public exploitExposed: 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 PROB
87%
EPSS %ILE
100%
KEV
⚠ Exploited

Published

February 5, 2020

Last Modified

November 7, 2025

Advisory Details (4)

Auto-updated Sep 17, 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

Banned | Packet Storm

http://packetstormsecurity.com/files/157106/PlaySMS-index.php-Unauthenticated-Template-Injection-Code-Execution.html
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 50× in last 7d / 221× 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 786 total refreshes for this CVE.

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