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CVE-2016-2155

17
FAUCET Score

CVE-2016-2155 describes an improper authorization vulnerability in the grade-reporting feature of Moodle versions 2.8.x, 2.9.x, and 3.0.x. Specifically, the "Exclude grade" setting can be modified by authenticated users with the Non-Editing Instructor role, bypassing the intended moodle/grade:manage capability. This vulnerability has a CVSSv3 score of 4.3 (Medium), indicating a low-complexity attack requiring authentication over a network, with a potential impact of low integrity. There is no evidence of active exploitation, public exploit code (Metasploit, Nuclei, ExploitDB), or significant community discussion or media coverage surrounding this CVE.

Impacted Technologies

VendorProductVersion(s)CPE
2.8.0CPE matchmatch criteria
cpe:2.3:a:moodle:moodle:2.8.0:*:*:*:*:*:*:*
2.8.1CPE matchmatch criteria
cpe:2.3:a:moodle:moodle:2.8.1:*:*:*:*:*:*:*
2.8.2CPE matchmatch criteria
cpe:2.3:a:moodle:moodle:2.8.2:*:*:*:*:*:*:*
2.8.3CPE matchmatch criteria
cpe:2.3:a:moodle:moodle:2.8.3:*:*:*:*:*:*:*
2.8.4CPE matchmatch criteria
cpe:2.3:a:moodle:moodle:2.8.4:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.0

4.3MEDIUM

CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
LOW
Availability Impact
NONE
Exploitability Score
2.8
Impact Score
1.4
CvssVersion
3.0

Exploit Intelligence

EPSS Score
1.61%
Probability of exploitation in next 30 days
EPSS Percentile
73.5%
Percentile rank of EPSS score among Peer Group
As of 2026-07-24
Model: v2026.06.15
This CVE's current EPSS score of 0.0161 is in the 87th percentile among its peer group of 21,939 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.0 Mastodon, and 0.1 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.0 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (3)

composerpatch availablevia ghsa
Product: moodle/moodleFixed in: 2.8.11
composerpatch availablevia ghsa
Product: moodle/moodleFixed in: 2.9.5
composerpatch availablevia ghsa
Product: moodle/moodleFixed in: 3.0.3

Vendor Advisories (1)

composerGHSA-32hg-73hp-vwc8medium

Moodle allows attackers to modify "Exclude grade" settings

May 13, 2022

References

git.moodle.org / gw
moodle.org / mod/forum/discuss.php
Vendor Advisory
openwall.com / lists/oss-security/2016/03/21/1
securitytracker.com / id/1035333