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CVE-2021-21438

17
FAUCET Score

CVE-2021-21438 is a low-severity vulnerability affecting OTRS FAQ versions 6.0.29 and prior, and OTRS versions 7.0.24 and prior, where agents can view linked FAQ articles without proper permissions. The CVSS score of 4.3 (MEDIUM) indicates a network-based attack with low complexity, requiring low privileges, and resulting in a limited confidentiality impact with no integrity or availability impact. There is no evidence of active exploitation, public exploit code, or significant community discussion surrounding this vulnerability.

Impacted Technologies

VendorProductVersion(s)CPE
>= 6.0.0, < 6.0.29CPE matchmatch criteria
cpe:2.3:a:otrs:faq:*:*:*:*:*:*:*:*
>= 7.0.0, < 7.0.24CPE matchmatch criteria
cpe:2.3:a:otrs:otrs:*:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

3.5LOW

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

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
LOW
User Interaction
REQUIRED
Scope
UNCHANGED
Confidentiality Impact
LOW
Integrity Impact
NONE
Availability Impact
NONE
Exploitability Score
2.1
Impact Score
1.4
CvssVersion
3.1

Exploit Intelligence

EPSS Score
0.63%
Probability of exploitation in next 30 days
EPSS Percentile
46.8%
Percentile rank of EPSS score among Peer Group
As of 2026-07-28
Model: v2026.06.15
This CVE's current EPSS score of 0.0063 is in the 57th percentile among its peer group of 21,977 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.0 Mastodon, and 0.1 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

otrs.com / release-notes/otrs-security-advisory-2021-08
Vendor Advisory