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CVE-2017-17455

20
FAUCET Score

CVE-2017-17455 describes a vulnerability in Mahara versions 16.10.x before 16.10.7, 17.04.x before 17.04.5, and 17.10.x before 17.10.2, where a man-in-the-middle (MitM) attacker can force a user's connection to downgrade from HTTPS to HTTP, even when an SSL certificate is present. This medium-severity vulnerability (CVSS 5.9) has a network attack vector and high attack complexity, potentially leading to a high impact on confidentiality due to unencrypted communication. 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
>= 16.10.0, < 16.10.7CPE matchmatch criteria
cpe:2.3:a:mahara:mahara:*:*:*:*:*:*:*:*
>= 17.04.0, < 17.04.5CPE matchmatch criteria
cpe:2.3:a:mahara:mahara:*:*:*:*:*:*:*:*
>= 17.10.0, < 17.10.2CPE matchmatch criteria
cpe:2.3:a:mahara:mahara:*:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.0

5.9MEDIUM

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

Attack Vector
NETWORK
Attack Complexity
HIGH
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
NONE
Availability Impact
NONE
Exploitability Score
2.2
Impact Score
3.6
CvssVersion
3.0

Exploit Intelligence

EPSS Score
0.62%
Probability of exploitation in next 30 days
EPSS Percentile
46.0%
Percentile rank of EPSS score among Peer Group
As of 2026-07-26
Model: v2026.06.15
This CVE's current EPSS score of 0.0062 is in the 8th percentile among its peer group of 19,955 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.0 Bluesky, 0.0 Mastodon, and 0.2 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

Remediation records are not available for this CVE.

References

bugs.launchpad.net / mahara/+bug/1734767
Third Party Advisory
mahara.org / interaction/forum/topic.php
Vendor Advisory
reviews.mahara.org
Vendor Advisory