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CVE-2021-43974

21
FAUCET Score

CVE-2021-43974 describes an authentication bypass vulnerability in SysAid ITIL 20.4.74 b10. Despite server-side settings to disable anonymous user registration, an attacker can directly submit registration data to the /enduserreg endpoint, creating new accounts without prior authentication. This medium-severity vulnerability (CVSS: 5.3) has a low impact on integrity (I:L) and requires no user interaction or authentication, making it easily exploitable over the network. There is currently no public exploit code, active exploitation, or significant community discussion surrounding this CVE.

Impacted Technologies

VendorProductVersion(s)CPE
20.4.74CPE matchmatch criteria
cpe:2.3:a:sysaid:itil:20.4.74:b10:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

5.3MEDIUM

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

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
LOW
Availability Impact
NONE
Exploitability Score
3.9
Impact Score
1.4
CvssVersion
3.1

Exploit Intelligence

EPSS Score
1.42%
Probability of exploitation in next 30 days
EPSS Percentile
70.0%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0142 is in the 52nd percentile among its peer group of 23,703 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.0 Mastodon, and 0.4 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

github.com / atredispartners/advisories/blob/master/ATREDIS-2021-0002.md
Broken LinkThird Party Advisory
github.com / atredispartners/advisories/blob/master/ATREDIS-2022-0001.md
ExploitThird Party Advisory
sysaid.com / it-service-management-software/incident-management
Vendor Advisory