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CVE-2021-44663

31
FAUCET Score

CVE-2021-44663 is a critical Remote Code Execution (RCE) vulnerability affecting Xerte Project Xerte through version 3.8.4, specifically within the elfinder connector.php component, and impacts nottingham.ac xerte_online_toolkits. With a CVSS score of 9.8, this vulnerability is easily exploitable over the network without user interaction, allowing for complete compromise of confidentiality, integrity, and availability. While no public exploit code or active exploitation has been observed, and community discussion is minimal, its critical severity warrants immediate patching.

Impacted Technologies

VendorProductVersion(s)CPE
<= 3.8.4CPE matchmatch criteria
cpe:2.3:a:nottingham.ac:xerte_online_toolkits:*:*:*:*:*:*:*:*

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
3.99%
Probability of exploitation in next 30 days
EPSS Percentile
89.4%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0399 is in the 82nd percentile among its peer group of 36,897 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

Patch Available

Vendor Patches (1)

github_advisorypatch availablevia nvd_reference
View patch

References

github.com / thexerteproject/xerteonlinetoolkits/commit/694a591b5ab7f634f036afaac10397cf3677a98c
PatchThird Party Advisory
riklutz.nl / 2021/10/30/unauthenticated-file-upload-to-remote-code-execution-in-xerte
ExploitThird Party Advisory
xerte.org.uk / index.php/en/news/blog/80-news/336-xerte-3-8-5-important-security-update-now-available
Release NotesVendor Advisory