CVE-2021-45835

CRITICALNVD 9.89.8—
EchelonGraph scoreMEDIUM confidence

Score 9.8 from GitHub Security Advisory (severity: CRITICAL) published 2022-03-19. NVD baseline CVSS 9.8; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, nvd
9.8
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS: 3%CVSS: 9.8Exploit: NoneExposed: 0

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

The Online Admission System 1.0 allows an unauthenticated attacker to upload or transfer files of dangerous types to the application through documents.php, which may be used to execute malicious code or lead to code execution.

CVSS v3
9.8
EG Score
9.8(medium)
EG Risk
50(Track)
EG Risk 50/100SSVC: 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%
Exploitation3% × 40%
Automatability30% × 15%
Action: Routine — remediate on your standard cadence.
EPSS
85.8%
KEV
Not listed

Published

March 18, 2022

Last Modified

November 21, 2024

Advisory Details (3)

Auto-updated Jun 29, 2026
🔬 Proof of concept available. No patch confirmed yet.
generic🟡 PoC Available

Online Admission System 1.0 - Remote Code Execution (RCE) (Unauthenticated) - PHP webapps Exploit

https://www.exploit-db.com/exploits/50623
generic

Security Vulnerability · Issue #2 · rskoolrash/Online-Admission-System · GitHub

https://github.com/rskoolrash/Online-Admission-System/issues/2
generic

GitHub - rskoolrash/Online-Admission-System: Online Admission System · GitHub

https://github.com/rskoolrash/Online-Admission-System

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 11× in last 7d / 45× 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. 2026-07-23 14:16 UTCEPSS rescore
  2. 2026-07-23 02:05 UTCEG score recompute
  3. 2026-07-22 22:52 UTCEG score recompute
  4. 2026-07-22 14:06 UTCEPSS rescore
  5. 2026-07-21 15:22 UTCEPSS rescore
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  1. 2026-07-06 16:25 UTCEPSS rescore
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  15. 2026-06-27 03:06 UTCEPSS rescore
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  17. 2026-06-25 13:48 UTCEPSS rescore
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  19. 2026-06-24 14:03 UTCEPSS rescore
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  23. 2026-06-22 14:24 UTCEPSS rescore
  24. 2026-06-21 14:55 UTCEPSS rescore
  25. 2026-06-21 01:58 UTCEPSS rescore
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  27. 2026-06-19 19:24 UTCEPSS rescore
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  29. 2026-06-18 17:51 UTCEPSS rescore
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  39. 2026-06-13 22:58 UTCEPSS rescore
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  41. 2026-06-12 23:10 UTCEPSS rescore
  42. 2026-06-11 13:58 UTCEPSS rescore
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  44. 2026-06-10 22:16 UTCEPSS rescore
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  46. 2026-06-10 13:20 UTCEPSS rescore
  47. 2026-06-07 15:23 UTCEPSS rescore
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  49. 2026-06-06 13:46 UTCEPSS rescore
  50. 2026-06-06 13:46 UTCEPSS rescore
  51. 2026-06-05 22:45 UTCEPSS rescore
  52. 2026-06-05 06:09 UTCEPSS rescore
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  58. 2026-06-01 13:50 UTCEPSS rescore
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  60. 2026-05-31 00:15 UTCEPSS rescore
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  62. 2026-05-29 13:42 UTCEPSS rescore
  63. 2026-05-28 13:43 UTCEPSS rescore
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  65. 2026-05-27 13:39 UTCEPSS rescore
  66. 2026-05-27 13:39 UTCEPSS rescore
  67. 2026-05-26 01:23 UTCEG score recompute
  68. 2026-05-26 01:23 UTCGHSA enrichment

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Frequently asked(5)

What is CVE-2021-45835?
CVE-2021-45835 is a critical vulnerability published on March 18, 2022. The Online Admission System 1.0 allows an unauthenticated attacker to upload or transfer files of dangerous types to the application through documents.php, which may be used to execute malicious code or lead to code execution.
When was CVE-2021-45835 disclosed?
CVE-2021-45835 was first published in the National Vulnerability Database on March 18, 2022, with the most recent update on November 21, 2024. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2021-45835 actively exploited?
CVE-2021-45835 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 85.8% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
What is the CVSS score of CVE-2021-45835?
CVE-2021-45835 has a CVSS v3 base score of 9.8 (NVD).
How do I remediate CVE-2021-45835?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2021-45835, 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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