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CVE-2021-28024

30
FAUCET Score

CVE-2021-28024 is a critical unauthorized access vulnerability affecting ServiceTonic Helpdesk software versions prior to 9.0.35937, allowing an attacker to bypass the login form without a password. With a CVSS score of 9.8, this vulnerability is easily exploitable over the network with low complexity, enabling full compromise of confidentiality, integrity, and availability. While no public exploit code or active exploitation has been observed, and community discussion is minimal, its high severity warrants immediate patching.

Impacted Technologies

VendorProductVersion(s)CPE
< 9.0.035937CPE matchmatch criteria
cpe:2.3:a:servicetonic:servicetonic:*:*:*:*:*:*:*:*

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
1.31%
Probability of exploitation in next 30 days
EPSS Percentile
67.7%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0131 is in the 54th percentile among its peer group of 36,862 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

servicetonic.com
Product
srlabs.de / bites/chaining-three-zero-day-exploits-in-itsm-software-servicetonic-for-remote-code-execution
ExploitThird Party Advisory