CVE-2021-35414

Exp

Chamilo LMS v1.11.x was discovered to contain a SQL injection via the doc parameter in main/plagiarism/compilatio/upload.php.

Published: 2021-12-03 Last update: 2026-06-16 Assigner: [email protected] Source: [email protected]

Conclusion & alert: CVE-2021-35414 is rated High Exploit Risk (81.1/100): CVSS Critical severity, with medium exploitation likelihood (EPSS 1.80%). Core evidence: 2 public exploit reference(s) are indexed (Exploit-DB). Mandatory action: Public exploits are available—assess exposure, apply mitigations, and prioritize patching.

Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.

Public exploit references (Exploit-DB) for CVE-2021-35414

EDB-ID Source Kind Published Link
nvd_ref exploit_tag Exploit-DB ↗
nvd_ref exploit_tag Exploit-DB ↗

Exploit prediction scoring system (EPSS) score for CVE-2021-35414

EPSS lead: Daily EPSS estimates relative likelihood of exploitation; percentile ranks this CVE among scored vulnerabilities (higher = more severe relative rank).

# Date Old EPSS score New EPSS score Delta (New - Old)
1 2026-06-15 1.34% 1.80% +0.46%
2 2025-12-14 2.20% 1.34% -0.86%
3 2025-05-12 2.20%

Full EPSS history (16 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2021-35414

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
9.8 3.1 CRITICAL
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H Click to expand
Attack vector (AV:N)
Could be attacked over the internet or any normal routed network—not just someone sitting at the machine.
Attack complexity (AC:L)
Once they can reach the bug, pulling it off is straightforward—no weird race conditions or rare setup.
Privileges required (PR:N)
No account or special rights needed—anonymous or random user is enough.
User interaction (UI:N)
Nobody has to click “OK” or open a trap file; it can work without a victim helping.
Scope (S:U)
Damage stays in the same “trust bubble” as the broken component—no big spill into unrelated systems.
Confidentiality (C:H)
Serious risk that confidential data gets exposed in a big way.
Integrity (I:H)
They could widely tamper with or forge data—trust in the data is badly hurt.
Availability (A:H)
Could take the service down hard or make it unusable for people who depend on it.
3.9 5.9 [email protected]
7.5 2.0 HIGH
AV:N/AC:L/Au:N/C:P/I:P/A:P Click to expand
Access vector (AV:N)
Can be exploited remotely over network reachability.
Access complexity (AC:L)
Exploitation conditions are straightforward and predictable.
Authentication (AU:N)
No authentication is required.
Confidentiality impact (C:P)
Partial confidentiality impact.
Integrity impact (I:P)
Partial integrity impact.
Availability impact (A:P)
Partial availability impact.
10.0 6.4 [email protected]

Weakness enumeration for CVE-2021-35414

Affected software / configurations for CVE-2021-35414

Vendor Product Version Raw CPE
chamilo chamilo_lms >= 1.11.0, <= 1.11.16 cpe:2.3:a:chamilo:chamilo_lms:*:*:*:*:*:*:*:*

References for CVE-2021-35414

URL Tags
https://github.com/andrejspuler/writeups/tree/main/chamilo-lms#unauthenticated-sql-injection-2-in-plugin Exploit Patch Third Party Advisory
https://github.com/andrejspuler/writeups/tree/main/chamilo-lms#unauthenticated-sql-injection-in-compilatio-module Exploit Patch Third Party Advisory
https://github.com/chamilo/chamilo-lms/commit/36149c1ff99973840a809bb865f23e1b23d6df00 Patch Third Party Advisory
https://github.com/chamilo/chamilo-lms/commit/6a98e32bb04aa66cbd0d29ad74d7d20cc7e7e9c5 Patch Third Party Advisory
https://github.com/chamilo/chamilo-lms/commit/f398b5b45c019f873a54fe25c815dbaaf963728b Patch Third Party Advisory
https://support.chamilo.org/projects/1/wiki/Security_issues#Issue-59-2021-05-13-High-impact-low-risk-Unauthenticated-SQL-injection-vulnerability-when-a-module-is-enabled Patch Vendor Advisory
https://support.chamilo.org/projects/1/wiki/Security_issues#Issue-65-2021-05-15-High-impact-very-high-risk-Unauthenticated-SQL-injection-in-plugin Patch Vendor Advisory
cvelogic Threat Intelligence