CVE-2023-36307: ZPLGFA 1.1.1 allows attackers to cause a panic (because of an integer index out of range during a ConvertToGra

Routine

MEDIUM 5.5DOWNGRADE

CVE-2023-36307 is a medium-severity flaw (CVSS 5.5) affecting zplgfa. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

ZPLGFA 1.1.1 allows attackers to cause a panic (because of an integer index out of range during a ConvertToGraphicField call) via an image of zero width. NOTE: it is unclear whether there are common use cases in which this panic could have any security consequence

Why this priority

Public exploit reference

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

Risk facts

CVSS score	5.5 (Medium)
Attack vector	Local
Attack complexity	Low
Privileges needed	None
User interaction	Required
EPSS exploit chance	0.3% (top 82%)
CISA exploited list	No
Weakness	CWE-129
Published	2023-09-05
Last modified	2026-06-17

Publisher (CNA): MITRE · Vendor: simonwaldherr

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

Am I affected?

Timeline

2023-09-05 05:15 UTCPublished CVE record published
2026-06-17 06:06 UTCUpdated Record last modified

simonwaldherr zplgfa DOWNGRADE

Affected: 1.1.1

Fixed in: no fixed release known

Safe to downgrade to: a release before 1.1.1

1. Check installed version

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

2. No fixed release: DOWNGRADE to a release before 1.1.1 (Debian / Ubuntu)

apt-cache madison zplgfa sudo apt install zplgfa=<VERSION_BEFORE_1.1.1> sudo apt-mark hold zplgfa

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

dnf --showduplicates list zplgfa sudo dnf downgrade zplgfa-<VERSION_BEFORE_1.1.1> sudo dnf versionlock add zplgfa

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-2023-36307?

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

Is CVE-2023-36307 being exploited?

CVE-2023-36307 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-2023-36307 affect?

CVE-2023-36307 affects zplgfa. Severity is medium (CVSS 5.5). ZPLGFA 1.1.1 allows attackers to cause a panic (because of an integer index out of range during a ConvertToGraphicField call) via an image of zero width. NOTE: it is unclear whether there are common use cases in which this panic could have

How urgent is CVE-2023-36307?

Priority 29/100. Public exploit reference

References

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