CVE-2025-0555

HIGH 7.7 ALL-YEARS

Published 2025-03-03 · Last modified 2025-03-04 · GitLab · NVD: Analyzed

A Cross Site Scripting (XSS) vulnerability in GitLab-EE affecting all versions from 16.6 prior to 17.7.6, 17.8 prior to 17.8.4, and 17.9 prior to 17.9.1 allows an attacker to bypass security controls and execute arbitrary scripts in a users browser under specific conditions.

ELEVATED IMPACT

Severe if exploited (CVSS 7.7), but no confirmed exploitation. Patch on a normal cadence.

Exploitation likelihood

0.5%chance of exploitation in 30 days · 42nd percentile

○ In CISA KEV○ Catalogued PoC◆ SSVC: exploitation none, automatable no

Impact if exploited

7.7CVSS 3.1 · HIGH · CNA

ConfidentialityHigh
IntegrityHigh
AvailabilityNone

What an attacker needs

✓Access: Reachable over the network — no local access needed
⚠Privileges: Requires a low-privilege account
⚠User interaction: A user must take an action (click / open a file)
⚠Complexity: Needs a race window or specific setup

✓ lowers the bar for an attacker · ⚠ raises it

Proof of concept

No public PoC is currently catalogued.

Search for new PoCs

Search GitHub now — results may be empty or unverified.

Tracked sources are checked weekly for the full archive, including PoCs published after the original disclosure. A later release appears after a tracked source lists it and a refresh succeeds.

Data snapshot: 2026-10-26T04:59:11.116Z

Affected

Vendors Gitlab

Products Gitlab

Weakness (CWE)

CWE-79: : Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')

CVSS vector

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

References and research data (JSON)

Known Affected Software Configurations

Vendor	Product	Version range
Gitlab	Gitlab	≥ 16.6.0 and < 17.7.6
Gitlab	Gitlab	≥ 17.8.0 and < 17.8.4
Gitlab	Gitlab	17.9.0

All CVSS metrics

HIGH 7.7 v3.1 · CNA Primary
CVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:C/C:H/I:H/A:N
HIGH 7.7 v3.1 · NVD Secondary
CVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:C/C:H/I:H/A:N
MEDIUM 6.1 v3.1 · NVD Primary
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N

References

Exploit-tagged references (not proof of a PoC)

https://hackerone.com/reports/2939833 technical-descriptionexploitpermissions-requiredPermissions RequiredCVE record · GitLab · Updated 2025-03-03T16:02:28.441Z
NVD · CVE-2025-0555 · Updated 2026-06-17T08:26:41.860

Advisories

https://euvd.enisa.europa.eu/vulnerability/EUVD-2025-5583 ADVISORYEUVD · EUVD-2025-5583

Technical & other

https://gitlab.com/gitlab-org/gitlab/-/issues/514004 issue-trackingpermissions-requiredBroken LinkCVE record · GitLab · Updated 2025-03-03T16:02:28.441Z
NVD · CVE-2025-0555 · Updated 2026-06-17T08:26:41.860

Sources: NVD · CVE.org · All sources and attribution · EPSS