CVE-2025-56515: File upload vulnerability in Fiora chat application 1.0.0 through user avatar upload functionality

This month

HIGH 8.8DOWNGRADE

CVE-2025-56515 is a high-severity flaw (CVSS 8.8) affecting fiora. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

File upload vulnerability in Fiora chat application 1.0.0 through user avatar upload functionality. The application fails to validate SVG file content, allowing malicious SVG files with embedded foreignObject elements containing iframe tags and JavaScript event handlers (onmouseover) to be uploaded and stored. When rendered, these SVG files execute arbitrary JavaScript, enabling attackers to steal user sessions, cookies, and perform unauthorized

Why this priority

High severity
Public exploit reference

No fix is published yet: follow the downgrade or mitigation steps.

Risk facts

CVSS score	8.8 (High)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	Required
EPSS exploit chance	0.5% (top 56%)
CISA exploited list	No
Weakness	CWE-79, CWE-434
Published	2025-10-01
Last modified	2026-06-17

Publisher (CNA): MITRE · Vendor: suisuijiang

Last updated 2026-06-17 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2025-10-01 16:15 UTCPublished CVE record published
2026-06-17 09:42 UTCUpdated Record last modified

suisuijiang fiora DOWNGRADE

Affected: 1.0.0

Fixed in: no fixed release known

Safe to downgrade to: a release before 1.0.0

1. Check installed version

apt-cache policy fiora || rpm -q fiora || fiora --version

2. No fixed release: DOWNGRADE to a release before 1.0.0 (Debian / Ubuntu)

apt-cache madison fiora sudo apt install fiora=<VERSION_BEFORE_1.0.0> sudo apt-mark hold fiora

2. No fixed release: DOWNGRADE (RHEL / Amazon Linux / Fedora)

dnf --showduplicates list fiora sudo dnf downgrade fiora-<VERSION_BEFORE_1.0.0> sudo dnf versionlock add fiora

Downgrade risk

Downgrading can break dependent software and may reopen older bugs. Read the distro advisory first and test on a non-production host.

After downgrade

Restart the service, and keep the package held until a fixed release ships.

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2025-56515?

fiora: downgrade or apply the listed mitigation. Exact commands for each OS are on this page.

Is CVE-2025-56515 being exploited?

CVE-2025-56515 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2025-56515 affect?

CVE-2025-56515 affects fiora. Severity is high (CVSS 8.8). File upload vulnerability in Fiora chat application 1.0.0 through user avatar upload functionality. The application fails to validate SVG file content, allowing malicious SVG files with embedded foreignObject elements containing iframe tags

How urgent is CVE-2025-56515?

Priority 47/100. High severity; Public exploit reference

Related CVEs

CVE-2025-56514 MEDIUM 5.4 DOWNGRADE Cross Site Scripting (XSS) vulnerability in Fiora chat application 1.0.0 allows executes arbitrary JavaScript

References

← Back to latest CVEs