Predictive Vulnerability Intelligence.

Product

  • Product
  • Pricing
  • Documentation

Company

  • About
  • Partnerships
  • Blog
  • Support

Legal

  • Terms
  • Privacy
  • Data Licensing

© 2026 FAUCET Technologies LLC. All rights reserved.

CVE-2021-23803

28
FAUCET Score

CVE-2021-23803 is a critical vulnerability affecting the nette/latte package prior to version 2.10.6, allowing for a bypass of function restrictions within templates. An attacker can achieve this by injecting control characters (x00-x08) after a disallowed function. With a CVSS score of 9.8 (CRITICAL), this vulnerability presents a severe risk due to its network-based attack vector, low complexity, and potential for complete compromise of confidentiality, integrity, and availability. Currently, there is no evidence of active exploitation, public exploit code, or significant community discussion surrounding this CVE.

Impacted Technologies

VendorProductVersion(s)CPE
< 2.10.6CPE matchmatch criteria
cpe:2.3:a:nette:latte:*:*:*:*:*:*:*:*

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
1.58%
Probability of exploitation in next 30 days
EPSS Percentile
72.9%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0158 is in the 60th 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

Patch Available

Vendor Patches (2)

composerpatch availablevia ghsa
Product: latte/latteFixed in: 2.10.6
github_advisorypatch availablevia nvd_reference
View patch

Vendor Advisories (1)

composerGHSA-6pj2-5fqq-xvjccritical

Incorrect Authorization in latte/latte

Jan 6, 2022

References

github.com / nette/latte/commit/227c86eda9a8a6d060ea8501923e768b6d992210
PatchThird Party Advisory
github.com / nette/latte/issues/279
ExploitIssue TrackingPatchThird Party Advisory
snyk.io / vuln/SNYK-PHP-LATTELATTE-1932226
ExploitPatchThird Party Advisory