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CVE-2018-1133

56
FAUCET Score

CVE-2018-1133 is an eval injection vulnerability affecting Moodle 3.x, allowing a Teacher role to achieve remote code execution on the server by crafting a malicious Calculated question. This vulnerability carries a high CVSS score of 8.8, indicating a critical risk due to its low attack complexity, requiring only low privileges, and potential for complete compromise of confidentiality, integrity, and availability. While not listed on the CISA KEV catalog, an exploit is publicly available on ExploitDB, and its high EPSS score suggests a significant likelihood of exploitation. Despite the availability of an exploit, there is no recorded community discussion or media coverage surrounding this CVE.

Impacted Technologies

VendorProductVersion(s)CPE
>= 3.1.0, <= 3.1.11CPE matchmatch criteria
cpe:2.3:a:moodle:moodle:*:*:*:*:*:*:*:*
>= 3.2.0, <= 3.2.8CPE matchmatch criteria
cpe:2.3:a:moodle:moodle:*:*:*:*:*:*:*:*
>= 3.3.0, <= 3.3.5CPE matchmatch criteria
cpe:2.3:a:moodle:moodle:*:*:*:*:*:*:*:*
>= 3.4.0, <= 3.4.2CPE matchmatch criteria
cpe:2.3:a:moodle:moodle:*:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.0

8.8HIGH

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

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
Exploitability Score
2.8
Impact Score
5.9
CvssVersion
3.0

Exploit Intelligence

EPSS Score
32.23%
Probability of exploitation in next 30 days
EPSS Percentile
98.1%
Percentile rank of EPSS score among Peer Group
As of 2026-07-26
Model: v2026.06.15
ExploitDB: EDB-46551 · Mar 15, 2019
This CVE's current EPSS score of 0.3223 is in the 97th percentile among its peer group of 17,823 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.3 Bluesky, 0.1 Mastodon, and 0.2 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.1 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (4)

composerpatch availablevia ghsa
Product: moodle/moodleFixed in: 3.1.12
composerpatch availablevia ghsa
Product: moodle/moodleFixed in: 3.2.9
composerpatch availablevia ghsa
Product: moodle/moodleFixed in: 3.3.6
composerpatch availablevia ghsa
Product: moodle/moodleFixed in: 3.4.3

Vendor Advisories (1)

composerGHSA-xh2j-q4mc-v522high

Moodle calculated question type allows remote code execution by Question authors

May 13, 2022

References

moodle.org / mod/forum/discuss.php
PatchVendor Advisory
exploit-db.com / exploits/46551
ExploitThird Party AdvisoryVDB Entry
securityfocus.com / bid/104307
Third Party AdvisoryVDB Entry