CVE-2021-47843
Tagstoo 2.0.1 - Stored XSS to RCE
Description
Tagstoo 2.0.1 contains a stored cross-site scripting vulnerability that allows attackers to inject malicious payloads through files or custom tags. Attackers can execute arbitrary JavaScript code to spawn system processes, access files, and perform remote code execution on the victim's computer.
INFO
Published Date :
Jan. 15, 2026, 4:16 p.m.
Last Modified :
Feb. 5, 2026, 7:20 p.m.
Remotely Exploit :
Yes !
Source :
[email protected]
CVSS Scores
| Score | Version | Severity | Vector | Exploitability Score | Impact Score | Source |
|---|---|---|---|---|---|---|
| CVSS 3.1 | HIGH | 83251b91-4cc7-4094-a5c7-464a1b83ea10 | ||||
| CVSS 3.1 | HIGH | [email protected] | ||||
| CVSS 3.1 | HIGH | MITRE-CVE | ||||
| CVSS 3.1 | MEDIUM | [email protected] | ||||
| CVSS 3.1 | MEDIUM | [email protected] | ||||
| CVSS 4.0 | MEDIUM | 83251b91-4cc7-4094-a5c7-464a1b83ea10 | ||||
| CVSS 4.0 | MEDIUM | [email protected] |
Solution
- Update Tagstoo to the latest version.
- Sanitize all user-supplied input data.
- Validate file uploads and custom tag content.
- Implement output encoding for displayed data.
References to Advisories, Solutions, and Tools
Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2021-47843.
| URL | Resource |
|---|---|
| https://imgur.com/a/smeAjaW | Exploit |
| https://tagstoo.sourceforge.io/ | Product |
| https://www.exploit-db.com/exploits/49828 | Exploit Third Party Advisory |
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2021-47843 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2021-47843
weaknesses.
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2021-47843 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2021-47843 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
-
Modified Analysis by [email protected]
Feb. 05, 2026
Action Type Old Value New Value Changed CPE Configuration OR *cpe:2.3:a:tagstoo:tagstoo:2.0.1:*:*:*:*:*:*:* OR *cpe:2.3:a:pabloandumundu:tagstoo:2.0.1:*:*:*:*:*:*:* -
CVE Modified by [email protected]
Feb. 02, 2026
Action Type Old Value New Value Added CVSS V3.1 AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N Removed CVSS V3.1 AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:N -
Initial Analysis by [email protected]
Jan. 29, 2026
Action Type Old Value New Value Added CVSS V3.1 AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N Added CPE Configuration OR *cpe:2.3:a:tagstoo:tagstoo:2.0.1:*:*:*:*:*:*:* Added Reference Type VulnCheck: https://imgur.com/a/smeAjaW Types: Exploit Added Reference Type VulnCheck: https://tagstoo.sourceforge.io/ Types: Product Added Reference Type VulnCheck: https://www.exploit-db.com/exploits/49828 Types: Exploit, Third Party Advisory -
New CVE Received by [email protected]
Jan. 15, 2026
Action Type Old Value New Value Added Description Tagstoo 2.0.1 contains a stored cross-site scripting vulnerability that allows attackers to inject malicious payloads through files or custom tags. Attackers can execute arbitrary JavaScript code to spawn system processes, access files, and perform remote code execution on the victim's computer. Added CVSS V4.0 AV:N/AC:L/AT:N/PR:L/UI:P/VC:L/VI:L/VA:N/SC:L/SI:L/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X Added CVSS V3.1 AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:N Added CWE CWE-79 Added Reference https://imgur.com/a/smeAjaW Added Reference https://tagstoo.sourceforge.io/ Added Reference https://www.exploit-db.com/exploits/49828