CVE-2026-33698

CRITICALNVD 9.89.8—
EchelonGraph scoreMEDIUM confidence

This critical-severity CVE scores 9.8 under NVD CVSS v3. EPSS exploit probability: 0.3%, top 75% of all CVEs by exploit prediction. GitHub Security Advisory data not yet ingested — confidence will rise once GHSA publishes (typical lag: hours to days for open-source ecosystem CVEs; never for infrastructure-only CVEs).

Triggered by: NVD CVSS baseline
Sources: epss, nvd
9.8EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 9.8Exploit: None knownExposed: 0

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

Chamilo LMS is a learning management system. Prior to 1.11.38, a chained attack can enable otherwise-blocked PHP code from the main/install/ directory and allow an unauthenticated attacker to modify existing files or create new files where allowed by system permissions. This only affects portals with the main/install/ directory still present and read-accessible. This vulnerability is fixed in 1.11.38.

CVSS v3
9.8
EG Score
9.8(medium)
EG Risk
59(Track)
EG Risk 59/100SSVC: 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%
Exploitation0% × 40%
Automatability100% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
25%
KEV
Not listed

Published

April 10, 2026

Last Modified

April 16, 2026

Advisory Details (2)

Auto-updated Sep 9, 2026
Patch available. Sources: github_commit, github.
github Patch Available

Unauthenticated RCE in main/install folder (<=1.11.36) · Advisory · chamilo/chamilo-lms · GitHub

https://github.com/chamilo/chamilo-lms/security/advisories/GHSA-557g-2w66-gpmf
github_commit

commit d3355d7873c7 (chamilo/chamilo-lms)

Fix landed in chamilo/chamilo-lms commit d3355d7873c7 — awaiting tagged release

https://github.com/chamilo/chamilo-lms/commit/d3355d7873c7e5b907c5fa84cbd5d9b62ed33e51

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 7× in last 7d / 29× 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 160 total refreshes for this CVE.

  1. 2026-09-15 03:11 UTCEPSS rescore
  2. 2026-09-13 16:47 UTCEPSS rescore
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  1. 2026-08-19 17:03 UTCEPSS rescore
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  5. 2026-08-16 07:01 UTCEG score recompute
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  23. 2026-08-05 19:17 UTCEPSS rescore
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  25. 2026-08-04 10:38 UTCEPSS rescore
  26. 2026-08-03 21:53 UTCEG score recompute
  27. 2026-08-03 10:36 UTCEPSS rescore
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  42. 2026-07-23 03:09 UTCEG score recompute
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  44. 2026-07-20 19:02 UTCOSV refresh
  45. 2026-07-20 17:08 UTCEPSS rescore
  46. 2026-07-19 14:31 UTCEPSS rescore
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  73. 2026-06-28 04:56 UTCEPSS rescore
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  75. 2026-06-27 03:08 UTCEPSS rescore

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Frequently asked(5)

What is CVE-2026-33698?
CVE-2026-33698 is a critical vulnerability published on April 10, 2026. Chamilo LMS is a learning management system. Prior to 1.11.38, a chained attack can enable otherwise-blocked PHP code from the main/install/ directory and allow an unauthenticated attacker to modify existing files or create new files where allowed by system permissions. This only affects portals…
When was CVE-2026-33698 disclosed?
CVE-2026-33698 was first published in the National Vulnerability Database on April 10, 2026, with the most recent update on April 16, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-33698 actively exploited?
CVE-2026-33698 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0% probability of exploitation in the next 30 days, which ranks it in the top 75.0% of all scored CVEs.
What is the CVSS score of CVE-2026-33698?
CVE-2026-33698 has a CVSS v3 base score of 9.8 (NVD).
How do I remediate CVE-2026-33698?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-33698, 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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