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CVE-2021-43675

21
FAUCET Score

CVE-2021-43675 is a Cross-Site Scripting (XSS) vulnerability affecting Lychee-v3 version 3.2.16, specifically within the php/Access/Guest.php component. This medium-severity vulnerability (CVSS 6.1) allows an unauthenticated attacker to inject malicious scripts into a user-controlled albumID parameter, leading to low impact on confidentiality and integrity. While user interaction is required for exploitation, there is currently no evidence of active exploitation, public exploit code (Metasploit, Nuclei, ExploitDB), or significant community discussion or media coverage.

Impacted Technologies

VendorProductVersion(s)CPE
3.2.16CPE matchmatch criteria
cpe:2.3:a:lycheeorg:lychee:3.2.16:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

6.1MEDIUM

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

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
REQUIRED
Scope
CHANGED
Confidentiality Impact
LOW
Integrity Impact
LOW
Availability Impact
NONE
Exploitability Score
2.8
Impact Score
2.7
CvssVersion
3.1

Exploit Intelligence

EPSS Score
0.85%
Probability of exploitation in next 30 days
EPSS Percentile
54.4%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0085 is in the 64th percentile among its peer group of 26,234 CVEs.

Social Chatter

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

github.com / LycheeOrg/Lychee
Third Party Advisory
github.com / LycheeOrg/LycheeOrg.github.io/blob/master/docs/releases.md
Release NotesThird Party Advisory
github.com / LycheeOrg/Lychee-v3
Third Party Advisory