CVE-2025-66447 [Low] | Security Vulnerability in Chamilo Lms

CVE-2025-66447 is rated Low Risk (6.2/100): low exploitation likelihood (EPSS 0.17%). Low composite risk—no urgent action required; patch on your normal maintenance cycle and revisit priority if CVSS or EPSS increases.

#	Date	Old EPSS score	New EPSS score	Delta (New - Old)
1	2026-06-15	0.03%	0.17%	+0.14%
2	2026-04-11	—	0.03%	—

Date

Old EPSS score

New EPSS score

Delta (New - Old)

2026-06-15

0.03%

0.17%

+0.14%

2026-04-11

—

0.03%

—

Base score	Version	Severity	Vector	Exploitability	Impact	Score source
0.0	3.1	NONE	`CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:N` 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:N) Doesn’t really leak secrets in a meaningful way. Integrity (I:N) Data isn’t meaningfully altered or forged. Availability (A:N) Service keeps running; no real outage angle.	3.9	0.0	[email protected]
4.7	3.1	MEDIUM	`CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:N/I:L/A:N` 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:R) A real person has to do something—click, install, enable—otherwise it doesn’t land. Scope (S:C) Breaking this can reach past the original component and bite other resources—bigger blast radius. Confidentiality (C:N) Doesn’t really leak secrets in a meaningful way. Integrity (I:L) Attackers could change some data, but it’s limited—not everything goes. Availability (A:N) Service keeps running; no real outage angle.	2.8	1.4	[email protected]

Base score

Version

Severity

Vector

Exploitability

Impact

Score source

0.0

3.1

NONE

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:N 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:N): Doesn’t really leak secrets in a meaningful way.
Integrity (I:N): Data isn’t meaningfully altered or forged.
Availability (A:N): Service keeps running; no real outage angle.

3.9

0.0

[email protected]

4.7

3.1

MEDIUM

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:N/I:L/A:N 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:R): A real person has to do something—click, install, enable—otherwise it doesn’t land.
Scope (S:C): Breaking this can reach past the original component and bite other resources—bigger blast radius.
Confidentiality (C:N): Doesn’t really leak secrets in a meaningful way.
Integrity (I:L): Attackers could change some data, but it’s limited—not everything goes.
Availability (A:N): Service keeps running; no real outage angle.

2.8

1.4

[email protected]

Affected software / configurations for CVE-2025-66447

Vendor	Product	Version	Raw CPE
chamilo	chamilo_lms	<= 1.11.38	cpe:2.3:a:chamilo:chamilo_lms::::::::
chamilo	chamilo_lms	2.0.0	cpe:2.3:a:chamilo:chamilo_lms:2.0.0:alpha1::::::
chamilo	chamilo_lms	2.0.0	cpe:2.3:a:chamilo:chamilo_lms:2.0.0:alpha2::::::
chamilo	chamilo_lms	2.0.0	cpe:2.3:a:chamilo:chamilo_lms:2.0.0:alpha3::::::
chamilo	chamilo_lms	2.0.0	cpe:2.3:a:chamilo:chamilo_lms:2.0.0:alpha4::::::
chamilo	chamilo_lms	2.0.0	cpe:2.3:a:chamilo:chamilo_lms:2.0.0:alpha5::::::
chamilo	chamilo_lms	2.0.0	cpe:2.3:a:chamilo:chamilo_lms:2.0.0:beta1::::::
chamilo	chamilo_lms	2.0.0	cpe:2.3:a:chamilo:chamilo_lms:2.0.0:beta2::::::
chamilo	chamilo_lms	2.0.0	cpe:2.3:a:chamilo:chamilo_lms:2.0.0:beta3::::::
chamilo	chamilo_lms	2.0.0	cpe:2.3:a:chamilo:chamilo_lms:2.0.0:rc1::::::
chamilo	chamilo_lms	2.0.0	cpe:2.3:a:chamilo:chamilo_lms:2.0.0:rc2::::::

References for CVE-2025-66447

URL	Tags
https://github.com/chamilo/chamilo-lms/commit/73ae6293adaa6098374bc22625342dbae5cbc446	Patch
https://github.com/chamilo/chamilo-lms/security/advisories/GHSA-m82x-prv3-rwwv	Vendor Advisory

URL

CVE-2025-66447 | Chamilo LMS has validation-less redirect on login page

Exploit prediction scoring system (EPSS) score for CVE-2025-66447

Common vulnerability scoring system (CVSS) metrics for CVE-2025-66447

Weakness enumeration for CVE-2025-66447

Affected software / configurations for CVE-2025-66447

References for CVE-2025-66447