CVE-2020-6113: An exploitable vulnerability exists in the object stream parsing functionality of Nitro Software, Inc.’s Nitro

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HIGH 7.8DOWNGRADE

CVE-2020-6113 is a high-severity flaw (CVSS 7.8) affecting nitro pro. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

An exploitable vulnerability exists in the object stream parsing functionality of Nitro Software, Inc.’s Nitro Pro 13.13.2.242 when updating its cross-reference table. When processing an object stream from a PDF document, the application will perform a calculation in order to allocate memory for the list of indirect objects. Due to an error when calculating this size, an integer overflow may occur which can result in an undersized buffer being al

Why this priority

High severity
EPSS top 1%: very likely to be exploited
Public exploit reference

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

Risk facts

CVSS score	7.8 (High)
Attack vector	Local
Attack complexity	Low
Privileges needed	None
User interaction	Required
EPSS exploit chance	64.1% (top 1%)
CISA exploited list	No
Weakness	CWE-190, CWE-131, CWE-787
Published	2020-09-17
Last modified	2026-06-17

Publisher (CNA): Talos · Vendor: gonitro

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

Am I affected?

Timeline

2020-09-17 13:15 UTCPublished CVE record published
2026-06-17 03:22 UTCUpdated Record last modified

gonitro nitro pro DOWNGRADE

Affected: 13.13.2.242 · 13.16.2.300

Fixed in: no fixed release known

Safe to downgrade to: a release before 13.13.2.242

1. Check installed version

apt-cache policy nitro-pro || rpm -q nitro-pro || nitro-pro --version

2. No fixed release: DOWNGRADE to a release before 13.13.2.242 (Debian / Ubuntu)

apt-cache madison nitro-pro sudo apt install nitro-pro=<VERSION_BEFORE_13.13.2.242> sudo apt-mark hold nitro-pro

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

dnf --showduplicates list nitro-pro sudo dnf downgrade nitro-pro-<VERSION_BEFORE_13.13.2.242> sudo dnf versionlock add nitro-pro

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-2020-6113?

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

Is CVE-2020-6113 being exploited?

CVE-2020-6113 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-2020-6113 affect?

CVE-2020-6113 affects nitro pro. Severity is high (CVSS 7.8). An exploitable vulnerability exists in the object stream parsing functionality of Nitro Software, Inc.’s Nitro Pro 13.13.2.242 when updating its cross-reference table. When processing an object stream from a PDF document, the application wi

How urgent is CVE-2020-6113?

Priority 57/100. High severity; EPSS top 1%: very likely to be exploited; Public exploit reference

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CVE-2020-6146 HIGH 8.8 DOWNGRADE An exploitable code execution vulnerability exists in the rendering functionality of Nitro Pro 13.13.2.242 and
CVE-2020-6116 HIGH 7.8 DOWNGRADE An arbitrary code execution vulnerability exists in the rendering functionality of Nitro Software, Inc.’s Nitr

References

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