A Persistent Cross-site Scripting vulnerability is found in ElkarBackup v1.3.3, where an attacker can steal the user session cookie using t…

published 2020-09-15 6 y ago modified 2026-06-17 4 mo ago also EUVD-2020-17628

cvss: 5.4; version 3.1, NVD
cisa kev: Not listed; not in CISA's catalog
epss: 0.8%; EPSS 0.8% chance of exploitation in 30 days, percentile 56%
public exploits: 0; none known

A Persistent Cross-site Scripting vulnerability is found in ElkarBackup v1.3.3, where an attacker can steal the user session cookie using this vulnerability present on Policies >> action >> Name Parameter

Exploit prediction

0.78% chance of exploitation in the next 30 days, higher than 56% of all scored CVEs (FIRST EPSS, 2026-11-08).

Exploits and checks

vyshnavvizz.blogspot.com https://vyshnavvizz.blogspot.com/2020/09/stored-cross-site-scripting-in.html referenced PoC, tagged "exploit" by a source, unverified
github.com https://github.com/sooraj24/new/blob/master/XSS%20in%20ElkarBackup referenced PoC, tagged "exploit" by a source, unverified

CVSS scores

assigned by	version	score	vector
NVD	3.1	5.4	CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N
NVD	2.0	3.5	AV:N/AC:M/Au:S/C:N/I:P/A:N

Classification

Weakness

CWE-79 Improper Neutralization of Input During Web Page Generation

References

vyshnavvizz.blogspot.com /2020/09/stored-cross-site-scripting-in.html
exploit, third-party-advisory
github.com /sooraj24/new/blob/master/XSS%20in%20ElkarBackup
exploit, third-party-advisory
elkarbackup.org /
product

Sources

CVE List CVE-2020-24924
NVD CVE-2020-24924

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