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CVE-2021-30164

29
FAUCET Score

CVE-2021-30164 is a critical vulnerability affecting Redmine versions prior to 4.0.8 and 4.1.x before 4.1.2, allowing attackers to bypass the add_issue_notes permission via the Issues API. With a CVSS score of 9.8, this vulnerability is easily exploitable over the network with no user interaction, leading to high impact on confidentiality, integrity, and availability. Despite its severity, there is no evidence of active exploitation, public exploit code, or significant community discussion surrounding this CVE.

Impacted Technologies

VendorProductVersion(s)CPE
< 4.0.8CPE matchmatch criteria
cpe:2.3:a:redmine:redmine:*:*:*:*:*:*:*:*
>= 4.1.0, < 4.1.2CPE matchmatch criteria
cpe:2.3:a:redmine:redmine:*:*:*:*:*:*:*:*
9.0CPE matchmatch criteria
cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:*

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
1.32%
Probability of exploitation in next 30 days
EPSS Percentile
67.8%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0132 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

lists.debian.org / debian-lts-announce/2021/05/msg00013.html
Mailing ListThird Party Advisory
redmine.org / projects/redmine/wiki/Security_Advisories
Not Applicable