yaffa vulnerable to Cross Site Scripting

published 2026-04-07 7 mo ago modified 2026-11-04 4 d ago also GHSA-pq95-94c9-j987 , EUVD-2025-209275

cvss: 6.1; version 3.1, CNA
cisa kev: Not listed; not in CISA's catalog
epss: 0.3%; EPSS 0.3% chance of exploitation in 30 days, percentile 20%
public exploits: 0; none known

yaffa v2.0.0 is vulnerable to Cross Site Scripting (XSS). An attacker can inject malicious JavaScript into the "Add Account Group" function on the account-group page, allowing execution of arbitrary script in the context of users who view the affected page.

CISA SSVC

Exploitation: none
Automatable: no
Technical impact: partial
Assessed: 7 mo ago (2026-04-09)

Exploit prediction

0.28% chance of exploitation in the next 30 days, higher than 20% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by	version	score	vector
CISA ADP	3.1	6.1	CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
CNA	3.1	6.1	CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/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
packagist	kantorge/yaffa	<=2.0.0	no fix listed

Classification

Weakness

CWE-94 Improper Control of Generation of Code
CWE-79 Improper Neutralization of Input During Web Page Generation

References

github.com /kantorge/yaffa
package, product
github.com /J4cky1028/vulnerability-research/tree/main/CVE-2025-70844
web, third-party-advisory
nvd.nist.gov /vuln/detail/CVE-2025-70844
advisory

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