CVE-2026-6858

HIGH 7.1 PoC AVAILABLE

Published 2026-06-22 · Last modified 2026-06-22

The Transbank Webpay WordPress plugin before 1.14.0 does not sanitize and escape logs to be displayed, allowing unauthenticated users to perform Stored XSS attacks against logged in administrator

EXPLOIT AVAILABLE

Public exploit or PoC code exists. Modeled probability is still low, but the barrier to attack is reduced — watch closely.

Exploitation likelihood

0.2%chance of exploitation in 30 days · 6th percentile

○ In CISA KEV ● Public exploit / PoC

Impact if exploited

7.1CVSS 3.1 · HIGH

ConfidentialityLow
IntegrityLow
AvailabilityLow

What an attacker needs

✓Access: Reachable over the network — no local access needed
✓Privileges: No account or privileges required
⚠User interaction: A user must take an action (click / open a file)
✓Complexity: No special conditions — reliably repeatable

✓ lowers the bar for an attacker · ⚠ raises it

Proof of concept & exploit code

PoC https://wpscan.com/vulnerability/81035d75-81a5-486a-a9fb-b0d1e0befe3c/

Listed for defensive triage and patch prioritization.

Affected

Vendors Unknown

Products Transbank Webpay

Weakness (CWE)

CWE-79: Cross-site scripting (XSS)

CVSS vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:L

References

Exploits & PoC

https://wpscan.com/vulnerability/81035d75-81a5-486a-a9fb-b0d1e0befe3c/ exploitvdb-entrytechnical-description

Sources: NVD · CVE.org · EPSS