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CVE-2021-43836

28
FAUCET Score

CVE-2021-43836 is a critical vulnerability affecting Sulu, an open-source PHP content management system, allowing authenticated attackers to read arbitrary local files and achieve remote code execution in a default configuration. With a CVSS score of 8.8 (HIGH), it presents a significant risk due to its low attack complexity and high impact on confidentiality, integrity, and availability. While no active exploitation, public exploits, or significant community discussion have been observed, immediate patching to versions 1.6.44, 2.2.18, 2.3.8, or 2.4.0 is strongly recommended.

Impacted Technologies

VendorProductVersion(s)CPE
< 1.6.44CPE matchmatch criteria
cpe:2.3:a:sulu:sulu:*:*:*:*:*:*:*:*
>= 2.0.0, < 2.2.18CPE matchmatch criteria
cpe:2.3:a:sulu:sulu:*:*:*:*:*:*:*:*
>= 2.3.0, < 2.3.8CPE matchmatch criteria
cpe:2.3:a:sulu:sulu:*:*:*:*:*:*:*:*
2.4.0CPE matchmatch criteria
cpe:2.3:a:sulu:sulu:2.4.0:rc1:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

8.5HIGH

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

Attack Vector
NETWORK
Attack Complexity
HIGH
Privileges Required
LOW
User Interaction
NONE
Scope
CHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
Exploitability Score
1.8
Impact Score
6.0
CvssVersion
3.1

Exploit Intelligence

EPSS Score
1.98%
Probability of exploitation in next 30 days
EPSS Percentile
78.5%
Percentile rank of EPSS score among Peer Group
As of 2026-07-26
Model: v2026.06.15
This CVE's current EPSS score of 0.0198 is in the 77th percentile among its peer group of 17,823 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.3 Bluesky, 0.1 Mastodon, and 0.2 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

Patch Available

Vendor Patches (5)

composerpatch availablevia ghsa
Product: sulu/suluFixed in: 1.6.44
composerpatch availablevia ghsa
Product: sulu/suluFixed in: 2.2.18
composerpatch availablevia ghsa
Product: sulu/suluFixed in: 2.3.8
composerpatch availablevia ghsa
Product: sulu/suluFixed in: 2.4.0
github_advisorypatch availablevia nvd_reference
View patch

Vendor Advisories (1)

composerGHSA-vx6j-pjrh-vgjhhigh

PHP file inclusion in the Sulu admin panel

Dec 15, 2021

References

github.com / sulu/sulu/commit/9c948f9ce350c68b53af8c3910e2cefc7f722b54
PatchThird Party Advisory
github.com / sulu/sulu/security/advisories/GHSA-vx6j-pjrh-vgjh
Third Party Advisory