Cross-site Scripting (XSS)

published 2021-11-22 4 y ago modified 2026-06-17 4 mo ago also GHSA-89q5-mj78-pw5w , EUVD-2021-2480

cvss: 5.4; version 3.1, CNA
cisa kev: Not listed; not in CISA's catalog
epss: 0.8%; EPSS 0.8% chance of exploitation in 30 days, percentile 58%
public exploits: 0; none known

This affects all versions of package pekeupload. If an attacker induces a user to upload a file whose name contains javascript code, the javascript code will be executed.

Exploit prediction

0.85% chance of exploitation in the next 30 days, higher than 58% of all scored CVEs (FIRST EPSS, 2026-11-08).

Exploits and checks

snyk.io https://snyk.io/vuln/SNYK-JS-PEKEUPLOAD-1584360 referenced PoC, tagged "exploit" by a source, unverified

CVSS scores

assigned by	version	score	vector
CNA	3.1	5.4	CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:N/E:P
CNA	3.1	5.4	CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:N
NVD	3.1	6.1	CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
NVD	2.0	4.3	AV:N/AC:M/Au:N/C:N/I:P/A:N
GitHub	3.1	6.1	CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N

Affected packages

ecosystem	package	affected	fixed in
npm	pekeupload	<=2.1.1	no fix listed

Affected products

n/a pekeupload

Classification

Weakness

CWE-79 Improper Neutralization of Input During Web Page Generation

References

snyk.io /vuln/SNYK-JS-PEKEUPLOAD-1584360
web, exploit, third-party-advisory
github.com /moxiecode/plupload/blob/120cc0b5dd3373d7181fd11b06ac2557c890d3f0/js/jquery.plupload.queue/jquery.plupload.que
web, broken-link, third-party-advisory
nvd.nist.gov /vuln/detail/CVE-2021-23673
advisory
github.com /moxiecode/plupload
package

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.

Summary