CVE-2019-13976: eGain Chat 15.0.3 allows unrestricted file upload.

This month

CRITICAL 9.8REMOTEDOWNGRADE

CVE-2019-13976 is a critical-severity flaw (CVSS 9.8) affecting chat. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

eGain Chat 15.0.3 allows unrestricted file upload.

Why this priority

Critical severity
Remotely exploitable, no login, no user action

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

Risk facts

CVSS score	9.8 (Critical)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	None
EPSS exploit chance	1.7% (top 22%)
CISA exploited list	No
Weakness	CWE-434
Published	2019-09-04
Last modified	2026-06-17

Publisher (CNA): MITRE · Vendor: egain

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

Am I affected?

Timeline

2019-09-04 16:15 UTCPublished CVE record published
2026-06-17 02:17 UTCUpdated Record last modified

egain chat DOWNGRADE

Affected: 15.0.3

Fixed in: no fixed release known

Safe to downgrade to: a release before 15.0.3

1. Check installed version

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

2. No fixed release: DOWNGRADE to a release before 15.0.3 (Debian / Ubuntu)

apt-cache madison chat sudo apt install chat=<VERSION_BEFORE_15.0.3> sudo apt-mark hold chat

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

dnf --showduplicates list chat sudo dnf downgrade chat-<VERSION_BEFORE_15.0.3> sudo dnf versionlock add chat

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-2019-13976?

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

Is CVE-2019-13976 being exploited?

CVE-2019-13976 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-2019-13976 affect?

CVE-2019-13976 affects chat. Severity is critical (CVSS 9.8). eGain Chat 15.0.3 allows unrestricted file upload.

How urgent is CVE-2019-13976?

Priority 59/100. Critical severity; Remotely exploitable, no login, no user action

Related CVEs

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CVE-2020-36625 MEDIUM 4.3 MITIGATE A vulnerability was found in destiny.gg chat
CVE-2020-15948 MEDIUM 6.1 DOWNGRADE eGain Chat 15.5.5 allows XSS via the Name (aka full_name) field.
CVE-2019-13975 MEDIUM 6.1 DOWNGRADE eGain Chat 15.0.3 allows HTML Injection.
CVE-2017-15892 MEDIUM 5.4 UPGRADE Multiple cross-site scripting (XSS) vulnerabilities in Slash Command Creator in Synology Chat before 2.0.0-112

References

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