CVE-2023-53980

CRITICALNVD 9.89.8—
EchelonGraph scoreMEDIUM confidence

Score 9.8 from GitHub Security Advisory (severity: HIGH) published 2025-12-23. NVD baseline CVSS 9.8; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, nvd
Elevated
9.8EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 1%CVSS: 9.8Exploit: Elevated riskExposed: 0

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

ProjectSend r1605 contains a remote code execution vulnerability that allows attackers to upload malicious files by manipulating file extensions. Attackers can upload shell scripts with disguised extensions through the upload.process.php endpoint to execute arbitrary commands on the server.

CVSS v3
9.8
EG Score
9.8(medium)
EG Risk
60(Track*)
EG Risk 60/100SSVC: Track*

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%
Exploitation40% × 40%
Automatability0% × 15%
Action: Watch closely — could escalate to Attend.
EPSS PROB
1%
EPSS %ILE
60%
KEV
Not listed

Published

December 22, 2025

Last Modified

December 26, 2025

Advisory Details (3)

Auto-updated Sep 17, 2026
🔬 Proof of concept available. No patch confirmed yet.
generic🟡 PoC Available

projectSend r1605 - Remote Code Exectution RCE - PHP webapps Exploit

https://www.exploit-db.com/exploits/51238
generic

ProjectSend r1605 Remote Code Execution via File Extension Manipulation | Advisories | VulnCheck

https://www.vulncheck.com/advisories/projectsend-remote-code-execution-via-file-extension-manipulation
generic

ProjectSend — The Open-Source Client Portal for File Sharing | Your Files. Your Server. Your Rules.

https://www.projectsend.org/

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 8× in last 7d / 30× 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 159 total refreshes for this CVE.

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

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Frequently asked(5)

What is CVE-2023-53980?
CVE-2023-53980 is a critical vulnerability published on December 22, 2025. ProjectSend r1605 contains a remote code execution vulnerability that allows attackers to upload malicious files by manipulating file extensions. Attackers can upload shell scripts with disguised extensions through the upload.process.php endpoint to execute arbitrary commands on the server.
When was CVE-2023-53980 disclosed?
CVE-2023-53980 was first published in the National Vulnerability Database on December 22, 2025, with the most recent update on December 26, 2025. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2023-53980 actively exploited?
CVE-2023-53980 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 1% probability of exploitation in the next 30 days, which ranks it in the top 40.4% of all scored CVEs.
What is the CVSS score of CVE-2023-53980?
CVE-2023-53980 has a CVSS v3 base score of 9.8 (NVD).
How do I remediate CVE-2023-53980?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2023-53980, 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.

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