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CVE-2021-23259

24
FAUCET Score

CVE-2021-23259 is a critical remote code execution (RCE) vulnerability affecting Crafter CMS, specifically versions of craftercms crafter_cms. Authenticated users with Administrator or Developer roles can exploit this flaw by injecting malicious Groovy scripts, which lack proper security restrictions, to execute arbitrary OS commands. This vulnerability carries a high CVSS score of 7.2, indicating a severe risk due to its network-based attack vector, low attack complexity, and high impact on confidentiality, integrity, and availability. While no public exploits (Metasploit, Nuclei, ExploitDB) or active exploitation have been identified, and community discussion is minimal, the potential for a complete system compromise remains significant.

Impacted Technologies

VendorProductVersion(s)CPE
>= 3.1.0, < 3.1.12CPE matchmatch criteria
cpe:2.3:a:craftercms:crafter_cms:*:*:*:*:*:*:*:*
>= 3.1, < 3.1.12CPE match
cpe:2.3:a:craftercms:crafter_cms:*:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

4.2MEDIUM

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

Attack Vector
NETWORK
Attack Complexity
HIGH
Privileges Required
HIGH
User Interaction
REQUIRED
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
HIGH
Exploitability Score
0.5
Impact Score
3.6
CvssVersion
3.1

Exploit Intelligence

EPSS Score
0.70%
Probability of exploitation in next 30 days
EPSS Percentile
49.5%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0070 is in the 29th percentile among its peer group of 5,531 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.1 Mastodon, and 0.3 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.1 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Remediation records are not available for this CVE.

References

docs.craftercms.org / en/3.1/security/advisory.html
Vendor Advisory