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CVE-2021-40849

29
FAUCET Score

CVE-2021-40849 is a critical vulnerability affecting Mahara versions prior to 20.04.5, 20.10.3, 21.04.2, and 21.10.0. This flaw allows an attacker to exploit web services tokens to gain unauthorized access to user accounts, leading to information disclosure and potential privilege escalation. With a CVSS score of 9.8 (CRITICAL), it presents a severe risk due to its network-based attack vector, low attack complexity, and high impact on confidentiality, integrity, and availability. Currently, there is no evidence of active exploitation, public exploit code (Metasploit, Nuclei, ExploitDB), or significant community discussion surrounding this CVE.

Impacted Technologies

VendorProductVersion(s)CPE
< 20.04.5CPE matchmatch criteria
cpe:2.3:a:mahara:mahara:*:*:*:*:*:*:*:*
>= 20.10.0, < 20.10.3CPE matchmatch criteria
cpe:2.3:a:mahara:mahara:*:*:*:*:*:*:*:*
>= 21.04.0, < 21.04.2CPE matchmatch criteria
cpe:2.3:a:mahara:mahara:*:*:*:*:*:*:*:*
21.10.0CPE matchmatch criteria
cpe:2.3:a:mahara:mahara:21.10.0:rc1:*:*:*:*:*:*
21.10.0CPE matchmatch criteria
cpe:2.3:a:mahara:mahara:21.10.0:rc2:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

9.8CRITICAL

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
Exploitability Score
3.9
Impact Score
5.9
CvssVersion
3.1

Exploit Intelligence

EPSS Score
1.31%
Probability of exploitation in next 30 days
EPSS Percentile
67.6%
Percentile rank of EPSS score among Peer Group
As of 2026-07-28
Model: v2026.06.15
This CVE's current EPSS score of 0.0131 is in the 54th percentile among its peer group of 36,897 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.1 Reddit, 0.3 Bluesky, 0.3 Mastodon, and 2.4 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.3 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Remediation records are not available for this CVE.

References

bugs.launchpad.net / mahara/+bug/1930469
Vendor Advisory
mahara.org / interaction/forum/topic.php
Vendor Advisory