CVE-2021-34187

CRITICALNVD 9.89.8—
EchelonGraph scoreMEDIUM confidence

This critical-severity CVE scores 9.8 under NVD CVSS v3. EPSS exploit probability: 16% (96th percentile of EPSS-scored CVEs). 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
Elevated
9.8EG
EchelonGraph verdictPlan mitigationSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 16%CVSS: 9.8Exploit: Elevated riskExposed services: Not assessed

An upstream fix is merged but not yet released — mitigate (WAF / firewall / segmentation) until the release ships, then apply it.

main/inc/ajax/model.ajax.php in Chamilo through 1.11.14 allows SQL Injection via the searchField, filters, or filters2 parameter.

CVSS v3
9.8
EG Score
9.8CRITICALmedium confidence
EG Risk
65
EG Risk 65/100CISA SSVC

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%
Automatability30% × 15%
CISA SSVC: Track at low, Track* at medium and Attend at high mission impact.
Action: An upstream fix is merged but not yet in a tagged release. Restrict network exposure of the affected system or apply the vendor's mitigation within your standard update timelines at low or medium mission impact and sooner than that at high until it ships, then apply the release.
EPSS PROB
16%
EPSS %ILE
96th
KEV
Not listed

CISA SSVCTrack at low, Track* at medium and Attend at high mission impact.

An upstream fix is merged but not yet in a tagged release. Restrict network exposure of the affected system or apply the vendor's mitigation within your standard update timelines at low or medium mission impact and sooner than that at high until it ships, then apply the release.

Exploitation public PoC (EG-KEV: elevated) · Automatable unknown (not published for this CVE) · Technical impact total (CVSS ≥ 9.0). Mission impact is CISA's Mission & Well-being decision point, and only you can judge it: high means the affected system is essential to your organisation's mission, or its compromise could cause irreversible harm to people. CISA's decision table

Published

June 28, 2021

Last Modified

November 21, 2024

Advisory Details (3)

Auto-updated Oct 3, 2026
Upstream fix merged — awaiting tagged release. Sources: github_commit.
generic

CVE-2021-34187. Unauthenticated SQL injection in Chamilo LMS 1.11.x and (dev version of) 2.0 – One brick to the IT world

https://murat.one/?p=118
github_commit

commit f7f93579ed64 (chamilo/chamilo-lms)

Fix landed in chamilo/chamilo-lms commit f7f93579ed64 — awaiting tagged release

https://github.com/chamilo/chamilo-lms/commit/f7f93579ed64765c2667910b9c24d031b0a00571
github_commit

commit 005dc8e9eccc (chamilo/chamilo-lms)

Fix landed in chamilo/chamilo-lms commit 005dc8e9eccc — awaiting tagged release

https://github.com/chamilo/chamilo-lms/commit/005dc8e9eccc6ea35264064ae09e2e84af8d5b59

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 6× in last 7d / 32× 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. 2026-10-03 14:22 UTCEPSS rescore
  2. 2026-10-01 19:46 UTCEPSS rescore
  3. 2026-09-30 15:37 UTCEG score recompute
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  10. 2026-09-25 23:45 UTCOSV refresh
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  1. 2026-09-11 14:49 UTCEPSS rescore
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  3. 2026-09-08 21:56 UTCEPSS rescore
  4. 2026-09-06 14:09 UTCOSV refresh
  5. 2026-09-06 13:45 UTCEPSS rescore
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  24. 2026-08-20 00:34 UTCOSV refresh
  25. 2026-08-19 17:01 UTCEPSS rescore
  26. 2026-08-18 13:45 UTCEPSS rescore
  27. 2026-08-16 14:53 UTCEPSS rescore
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  39. 2026-08-04 15:06 UTCEPSS rescore
  40. 2026-08-03 10:33 UTCEPSS rescore
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  45. 2026-07-30 01:28 UTCEPSS rescore
  46. 2026-07-28 15:33 UTCEPSS rescore
  47. 2026-07-26 14:52 UTCEPSS rescore
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  49. 2026-07-25 14:15 UTCEPSS rescore
  50. 2026-07-24 14:15 UTCEPSS rescore
  51. 2026-07-23 14:16 UTCEPSS rescore
  52. 2026-07-23 14:16 UTCEPSS rescore
  53. 2026-07-23 02:01 UTCEG score recompute
  54. 2026-07-22 22:48 UTCEG score recompute
  55. 2026-07-22 14:06 UTCEPSS rescore
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  57. 2026-07-21 15:22 UTCEPSS rescore
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  59. 2026-07-20 17:05 UTCEPSS rescore
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  63. 2026-07-18 17:29 UTCOSV refresh
  64. 2026-07-18 10:02 UTCEPSS rescore
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  68. 2026-07-15 16:55 UTCEPSS rescore
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  70. 2026-07-13 22:27 UTCEPSS rescore
  71. 2026-07-12 05:44 UTCEPSS rescore
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  73. 2026-07-11 08:25 UTCEPSS rescore
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  75. 2026-07-09 19:07 UTCEPSS rescore

Publicly available exploits

(1 reference)

Working exploit code is in the public domain. Defenders should treat patch urgency accordingly — public PoCs typically lead to mass-exploitation within 24-72 hours.

  • Nucleihttp/cves/2021/CVE-2021-34187.yaml
    First seen Jan 1, 2021

    Chamilo model.ajax.php - SQL Injection

    Open source ↗

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2021-34187?
CVE-2021-34187 is a critical vulnerability published on June 28, 2021. main/inc/ajax/model.ajax.php in Chamilo through 1.11.14 allows SQL Injection via the searchField, filters, or filters2 parameter.
When was CVE-2021-34187 disclosed?
CVE-2021-34187 was first published on June 28, 2021, 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-2021-34187 actively exploited?
CVE-2021-34187 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 16% probability of exploitation in the next 30 days (96th percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2021-34187?
CVE-2021-34187 has a CVSS v3 base score of 9.8 (NVD).
How do I remediate CVE-2021-34187?
An upstream fix for CVE-2021-34187 has been merged but is not yet in a tagged release. Until it ships, restrict network exposure of the affected system or apply the vendor's mitigation, then update to the release that contains the fix.

Dependency Blast Radius

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