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CVE-2021-28023

29
FAUCET Score

CVE-2021-28023 is a critical arbitrary file upload vulnerability affecting ServiceTonic Helpdesk software versions prior to 9.0.35937. An unauthenticated attacker can exploit this flaw by uploading a malicious ZIP file containing JSP code through the Service import feature, leading to remote code execution. With a CVSS score of 9.8 (CRITICAL), this vulnerability poses a significant risk due to its low attack complexity and potential for complete compromise of confidentiality, integrity, and availability. While no public exploits or active exploitation have been observed, and community discussion is minimal, the 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 2026-07-26
Model: v2026.06.15
This CVE's current EPSS score of 0.0131 is in the 54th percentile among its peer group of 36,835 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