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CVE-2017-20028

31
FAUCET Score

CVE-2017-20028 is a critical privilege escalation vulnerability affecting HumHub versions 0.20.1 and 1.0.0-beta.3. This flaw allows an unauthenticated, remote attacker to gain elevated privileges within the system. With a CVSS score of 9.8 (Critical), the vulnerability is easily exploitable over the network with no user interaction required, leading to high impacts on confidentiality, integrity, and availability. There is currently no public exploit code available, nor is there evidence of active exploitation or significant community discussion surrounding this CVE. Upgrading to HumHub version 1.0.0 is recommended to mitigate this risk.

Impacted Technologies

VendorProductVersion(s)CPE
0.20.1CPE matchmatch criteria
cpe:2.3:a:humhub:humhub:0.20.1:*:*:*:*:*:*:*
1.0.0CPE matchmatch criteria
cpe:2.3:a:humhub:humhub:1.0.0:beta3:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

5.6MEDIUM

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

Attack Vector
NETWORK
Attack Complexity
HIGH
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
LOW
Integrity Impact
LOW
Availability Impact
LOW
Exploitability Score
2.2
Impact Score
3.4
CvssVersion
3.1

Exploit Intelligence

EPSS Score
0.77%
Probability of exploitation in next 30 days
EPSS Percentile
51.9%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0077 is in the 35th 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

seclists.org / fulldisclosure/2017/Mar/48
Mailing ListThird Party Advisory
vuldb.com
Third Party Advisory