Lychee
CVE-2021-43675
MEDIUM
Vulnerability Assessment
| Weakness |
CWE
OWASP Top 10:2025
A05:2025 - Injection
ASVS 5.0
V1 - Encoding and Sanitization Output encoding, context-aware escaping
MITRE ATT&CK
2 techniques across 2 tactics: Initial Access, Execution The technique list with ATT&CK links and the kill-chain view is part of the Basic plan and up. |
| Impact | CVSS score of 6.1 (MEDIUM). Attack characteristics: network attack vector, low complexity, no privileges required, user interaction required. |
| Exploit ScenarioDerived | A remote attacker could inject malicious scripts into web pages viewed by other users by sending crafted requests to the affected application. No authentication is required to exploit this vulnerability. |
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Alert meAnalysisAI
Lychee-v3 3.2.16 is affected by a Cross Site Scripting (XSS) vulnerability in php/Access/Guest.php. Rated medium severity (CVSS 6.1), this vulnerability is remotely exploitable, no authentication required, low attack complexity. No vendor patch available.
RemediationAI
No vendor patch is available at time of analysis. Monitor vendor advisories for updates. Sanitize all user input, use Content-Security-Policy headers, encode output contextually (HTML, JS, URL). Use frameworks with built-in XSS protection.
Affects your stack
Find out whether the stacks and servers you run are on an affected version.
Checking this CVE against your own stacks and servers is part of the Basic plan and up.
Technical ContextAI · show details
This vulnerability is classified as Cross-Site Scripting (XSS) (CWE-79), which allows attackers to inject malicious scripts into web pages viewed by other users. Lychee-v3 3.2.16 is affected by a Cross Site Scripting (XSS) vulnerability in php/Access/Guest.php. The function exit will terminate the script and print the message to the user. The message will contain albumID which is controlled by the user. Affected products include: Lycheeorg Lychee.
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- Exploit and PoC references, threat intelligence from 22 sources
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Severity by source
AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
Primary rating from NVD · only source for this CVE.
CVSS VectorNVD
DescriptionNVD
Lychee-v3 3.2.16 is affected by a Cross Site Scripting (XSS) vulnerability in php/Access/Guest.php. The function exit will terminate the script and print the message to the user. The message will contain albumID which is controlled by the user.
Threat Intelligence Overview
NVD
CVE.org
EPSS
GitHub
How this decision was reached
The engine reads each signal below and applies a fixed list of rules from top to bottom. The first rule that matches sets the recommended action – like a statement, every line is shown.
What every action level means
SSVC AssessmentENISA
Priority Score
Attack Technique
Cross-Site Scripting occurs when an application accepts untrusted data and sends it to a web browser without proper validation or encoding.
Affected Products (CPE)NVD
Cross-site Request Forgery (CSRF) vulnerability in Lychee version 3.1.6, allows remote attackers to execute arbitrary co
Cross Site Scripting (XSS) vulnerability in Lychee 3.1.6, allows remote attackers to execute arbitrary code and obtain s
Lychee is a free photo-management tool. Rated critical severity (CVSS 9.8), this vulnerability is remotely exploitable,
Authenticated path traversal in Lychee photo-management tool prior to 7.6.4 allows any logged-in user to read files acce
Lychee photo management tool versions before 7.1.0 contain an authorization bypass in the album password unlock mechanis
Paid fulfillment bypass in Lychee (Supporter/Pro editions) before 7.7.0: the checkout validators accept any OmnipayProvi
Unauthenticated buyers on Lychee instances running the Supporter/Pro webshop can tamper with the parameters handed to th
Unauthenticated attackers who know the shared identifier of a public, password-protected Lychee album can pull down a ZI
Lychee photo-management instances running versions prior to 7.6.1 expose POST /api/v2/Album::unlock with no throttle, at
Denial of service in Lychee before 7.7.0 allows an authenticated user with upload/import permission to tie up image-proc
Unauthenticated remote attackers can retrieve a complete OpenAPI schema and repeatedly force CPU-intensive schema regene
Stored cross-site scripting in Lychee photo-management software (all versions prior to 7.6.0) allows an authenticated us
Exploit-DB